<list command> | grep something
i think this is very useful if u can do such thing like UNIX grep command.What i meant is like..

/msg NickServ listchans | grep SOp

so it will print only the line which have word 'SOp'

or,

/msg ChanServ akick #channel list | grep by aemarx

so it only print the line that have words 'by aemarx'.

i hope u ppl can understand what i meant(my english is very bad).