netflow on routerboard...

just wonder know, how can i monitor the routerboard netflow by using prtg?
and, is the RB411 and RB433 able to do that when in the only wds wireless bridge setup?

PRTG should support this: http://wiki.mikrotik.com/wiki/Manual:IP/Traffic_Flow

Traffic Flow in RouterOS is the same as Netflow elsewhere.