Limit the number of users allowed in your channel to either the current number of users, or the specified number.
vc/lock and vc/limit are actually the same command and can be used interchangably.
To remove any limit, use vc/unlock.
vc/lock
vc/limitNUMBER
vc/lockvc/lock 5vc/limitvc/lockvc/limit 5vc/lock 5