The on TEXT's can be combined:
on $*:TEXT:/^([+-])TK$/i:#: {
mode # $+($regml(1),smiljnut) 1
msg # 12Lockdown $iif($regml(1) == -,de) Active
}
PuNkTuReD is correct though, to an extent, though technically speaking, anyone will be able to lock down the channel, but only voices up will be able to unlock it.