Session limit per IP

Hello
I need to make session limit for 350 users. I think about 100 (i have to many p2p connections) ? Can you told me how i can do this ?

Try something like this:

/ip firewall filter
add chain=forward action=drop protocol=tcp in-interface=LAN connection-limit=100,32

In the connection-limit field the 100 number is the total connections, the 32 is the netmask, so with this you are applying a 100 connection limit to every IP on your LAN interface.