umm make a timer to execute every minute and set the channel limit to 4 more than the current users
hmm not sure if the following will do it (since i haven't written a script in SOME time)
alias startlimittimer {
timer1 0 60 mode $2 +l $calc( $nick($2,0) + 4 )
}
and
aliad stoplimittimer {
timer1 off
}
but still i'm not 100% sure