I have been searching for something very similar. The “plugin author” label on all the plugin pages on wordpress.org is what I am after. The “plugin contributor” option too would be useful. Although I don’t want the text as it is, but this ability to label to indicate the users importance within a forum is essential to my project. My issue is that they Keymaster, participant, ect ect labels are useless as the forum master wont have any moderation/admin capabilities. So i need to be able to select a user to have a custom label like “offical representative”. I was looking at the code above, but I’m not sure if it would work as I need, and across a multisite install.
I guess I am asking the same question, but is there a plugin that can allow a user to be given a unique label in the forum per site?