@gabrieltonon appears to be asking about visibility, but @pfaffman seems to be talking about the creation of tags, or tagging of threads.
I looked in the admin settings, and I see options that allow me to limit the ability tagging/creation of tags by Trust Level, but nothing that lets me limit visibility. I also don’t see a way to limit any of the tag options to admins, staff, or moderators.
@sam’s post here seems to indicate that visibility settings are coming, but not yet implemented. Can anyone clarify whether this is currently possible or not?