Hi.
I need rule: any ip can open 10 connections to any another ip, all another connections need drop.
Please help me and make example.
I know how limit total connections from one ip, but i need limit connections from unique ip to unique ip, tcp and udp if it real.
Thanks.

http://wiki.mikrotik.com/wiki/Manual:IP/Firewall/Filter
Read about 'dst-limit' with limit by 'src-and-dst-addresses', maybe this is what you are looking for.

HTH,