Wireshark · Ethereal-users: [Ethereal-users] Capture filter syntax -- Help

[patux@xxxxxxx]

Hi. I work with 2 computers: the server that runs under linux, and a client
running WinXP.
I want to sniff all the msn messenger packets, but I cannot make the right
syntax for the capture filter. I cannot let Ethereal go without filters
because the WinXP machine is running Emule, and the amount of packets is
really big.
Where can I find a manual for the capture filters more easy to understand
than the man page (of Ethereal or tcpdump).

Thanks