Adding temporary permissions

You can set a permission for a player, but only for a certain amount of time, using this syntax:

/lp user <player> permission settemp <permission> <true/false> <duration>

For example, to give Minecraft123 permission to use the /ban command but only for two days:

/lp user Minecraft123 permission settemp minecraft.command.ban true 2d

Or, to prevent them from using the /tell command for 5 minutes:

/lp user Minecraft123 permission settemp minecraft.command.tell false 5m