How to block specific udp port for mirroring?

I want to mirror all traffic (except udp port 999) from one interface to another on my rb1100. Is it possible?

You can make port mirroring on switch ports of RB1100,
http://wiki.mikrotik.com/wiki/Manual:Switch_Chip_Features#Port_Mirroring

I have RB1100. I want to mirror all traffic from one interface to another but except traffic from/to udp port 999. Is it possible?

I thought rule section aren’t ordered. Because list of rules doesn’t have drag-and-drop feature. I have made 1 rule to not mirror udp 999, and another 1 rule to mirror all other traffic.

Thanks, problem is solved.

by the way, you can move it from CLI - some feature leak of WinBox?..