Good day, i need to have a P2MP solution where the stations belong to diferent clients so they should not see each other.
How should i prevent one st from seeig the others?
You can do it with filter rules..
You can use diferent address range on each wds. Asign a Ip to the wds interface and make routed wds links.. I did years ago and it works.. But whats your concrete need?
We have a bridged point to multi point last mile solution, layer 2, so we dont really care which ips the clients use, but clients are different companies so we need them to be independant, filter rules should work?
Also, is it possible to tag vlans on the mikrotiks at the clients ends so we dont have to use switchs on each one of our clients?
If you have the same ip range, put all in a bridge, set “use firewall” in the bridge and make rules in interface bridge filter.
If your point to multi-point equipment will pass vlans, then yes, you can use vlans.
In winbox, just open interfaces, then click on VLAN tab. After you create a vlan it will appear as an interface, and you can assign IP to it, or pppoe client or whatever.
Firewall rules 
Thx