Restrict Member Tags

Hi,

I am using the Members app to restrict access to certain trade product ranges in Shop, using the tags system. It is working great, however have had an issue where a client has added their own tags which don't correspond to how I have set up the Shop.

Is it possible to restrict the available tags to only those set up by an admin? I have had a look in settings but I can't see anything for Members which would allow that restriction.

Thanks

Mike