Can you add options for support tags with color

I think I understand this

and limited to members can you this feature.

No idea what you mean

For example in the forum the members of the group A can add the TAG "important" before subject term whereas the others of the group B no. And group C can not add TAG…

Ok, makes sense. Does someone else need this?

A possible temporary solution (yet inferior): you can configure permissions to let some people (moderators) add [text tags] to the titles.