What you can do here is:
[1] Bind join to whois a user.
[2] Whois users when they join a channel where the bot is on.
[3] Bind another raw to the whois field.
[4] Check which channels the user is on by string matching or lsearch.
[5] If the user is on all the channels you have defined go ahead and kline him/her.
I have listed the procedure how this will work.
Sorry I am currently in no mood to script this at the moment, so you have to give it a try yourself or ask someone who is willing to lend you a hand!
