N        This condition is true if the currently selected client is the channel master of the currently selected channel.

Channel creation behavior

When a client is creating a channel, they are automatically assigned as the channel master. Should they leave, the master will be none, and if the original master rejoins, the master will remain as none.

However, since the channel does not usually exist yet during a Channel > On join request event, the channel being created will have no master, so this condition will usually return false for the creating client.