Help Microtik UDP Limit P2P

Hello all.
I have a small wisp and i am using microtik routerboards rb450g .
I have queues in place that mark other connections to limit download speed, as most P2P software uses encripted connections.
and as i have a wisp i have a tcp limit of 60 connections per ip address.

What i would like to be able to do is have a udp limit of 50 connections per ip address but i have no idear how.
I have read that udp is less of a connection or some thing like that. So does that mean i dont have to worry about it.

lets say i have 252 users going though my microtik and they have 200 udp sessions open each thats 50400 I know UDP is connection-less by design. But im sure my router will see how many less by design UDP connections i have then start smoking and blow up.

So if any one can guide me on how to limit UDP that will be great
Thanks

As far as I’m aware, your only real choice for limiting UDP type traffic that way is with the limit or dst-limit options.
http://wiki.mikrotik.com/wiki/Manual:IP/Firewall/Filter#Properties