Here are example for a clearing all chat, a timeout and a ban (in that order)
:tmi.twitch.tv CLEARCHAT #freddyoriginal
@ban-duration=100;ban-reason=test :tmi.twitch.tv CLEARCHAT #freddyoriginal :testuser1
@ban-reason= :tmi.twitch.tv CLEARCHAT #freddyoriginal :testuser1
But the question is why do you mod people you apparently can’t trust/do what they want in the first place?