mikrotik udp limit

Can someone please help i am trying to limit udp connections.
I know udp is a connection less of design.
But if i mark udp connections as other connections then will i be able to limit the udp to 50 connections per IP.
As i have a wireless WISP and i dont want to overload my DSL modem.
Thank you

http://forum.mikrotik.com/t/when-connection-limit-for-udp/3076/1