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/ip neighbor print where identity~"^CPE\\-"

is what you need to filter to only those with identies starting with "CPE-". And if you want to output them in a custom fashion, you can use the "as-value" argument.

e.g.

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:local cpes [/ip neighbor print as-value where identity~"^CPE\\-"];
:foreach cpe in=$cpes do={
    :put (($cpe->"address") . " " . $cpe->"identity");
}

Will print lines containing the IP, followed by a space, followed by the identity.

If you're typing directly into terminal, you need to surround the thing with "{" and "}", so that it is treated as a single unit. The alternative is to enter it in a script at "/system script".

Nice discussion ,
I want to display only the identity of the device , i do many tries to get the result but No success ...

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/ip neighbor print  where  interface=bridge1 address~"^192.168"

i did a script to detect the rogue dhcp server and it must show the damaged devices identity .. here is the code :

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# Count the number of devices who took rouge dhcp ip address
:local loop [:len [/ip neighbor find where interface=bridge1 address~"^192.168"]];

# Discover the identity of the devices who took rouge dhcp ip address <<>> Here is my issue !!
:local id [/ip neighbor find where interface=bridge1 address~"^192.168"]

# Show the number of the devices if found
:if ($loop>0) do={:log warning "$loop"

:delay 2s;

#Show The identity of the Devices if found <<>> Here is my issue !!
:log warning "$id"
}

# If there is no Rouge DHCP Server damages do log : No Loop  <<>> Here is another issue !! .. this logs with the twice situations !!!
:else do [:log warning "No Loop";]

i didn't know where is the wrong code !

# DEFINE YOUR SEARCH PARAMETERS

:local interfaceParam "bridge1"; 
:local addressParam "^192.168";

# INITIALIZE VALUES
:local loop [:len [/ip neighbor find where interface=$interfaceParam address~$addressParam]];
:local id [/ip neighbor find where interface=$interfaceParam address~$addressParam]
:local rogueIdentity;


# OUTPUT THE NUMBER OF ROGUE DEVICES DETECTED 
:if ($loop>0) do={:log warning "There are $loop rogue devices"} else={ :log warning "No rogue devices detected"};


# GET IDENTITIES OF ROGUE DEVICES
:foreach var in=$id do={
    :set $rogueIdentity [/ip neighbor get [/ip neighbor find where .id=$var] identity]; 
:log warning "Rogue device $rogueIdentity detected";



#:put $rogueIdentity;

}

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Hello, I think this might work for you, just replace your script with this. You can change the $interfaceParam and $addressParam to anything you like and it should output the correct identity. Feel free to ask any questions if something doesn't work for you.
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# DEFINE YOUR SEARCH PARAMETERS

:local interfaceParam "bridge1"; 
:local addressParam "^192.168";

# INITIALIZE VALUES
:local loop [:len [/ip neighbor find where interface=$interfaceParam address~$addressParam]];
:local id [/ip neighbor find where interface=$interfaceParam address~$addressParam]
:local rogueIdentity;


# OUTPUT THE NUMBER OF ROGUE DEVICES DETECTED 
:if ($loop>0) do={:log warning "There are $loop rogue devices"} else={ :log warning "No rogue devices detected"};

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Hello, I think this might work for you, just replace your script with this. You can change the $interfaceParam and $addressParam to anything you like and it should output the correct identity. Feel free to ask any questions if something doesn't work for you.
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# DEFINE YOUR SEARCH PARAMETERS

:local interfaceParam "bridge1"; 
:local addressParam "^192.168";

# INITIALIZE VALUES
:local loop [:len [/ip neighbor find where interface=$interfaceParam address~$addressParam]];
:local id [/ip neighbor find where interface=$interfaceParam address~$addressParam]
:local rogueIdentity;


# OUTPUT THE NUMBER OF ROGUE DEVICES DETECTED 
:if ($loop>0) do={:log warning "There are $loop rogue devices"} else={ :log warning "No rogue devices detected"};

Thank you so much , It's works a expected

You are really a genius , And there is an Arabian saying : teach me fishing better than fish me a fish

Where can I find the basic rules for learning scripting ?

Best Regards my hero !

Happy to help.

I suggest starting here https://wiki.mikrotik.com/wiki/Manual:Scripting , all you have to do is just take one router and try to write some basic things, whatever comes to mind, for example: Periodically check routers CPU temperature and output it to console or log. I suggest learning all about {find} and {get} commands in ROS, they are extremely valuable and will definitely be part of most scripts.

There are also some script examples to learn from here: https://wiki.mikrotik.com/wiki/Manual:S ... g-examples and here: https://wiki.mikrotik.com/wiki/Scripts , you can see how some things are done and build on that.

The best practice to get better at scripting your Mikrotik is to just do it, trial by error. You'll get there!