The advantage with Tags is that an item can have several Tags (e.g. from a Tag branch).
However, I sometimes would like to force it to use only one Tag from a branch. Thus, when I select a specific Tag, any other Tags would get removed.
For example in a branch I may only select one of: Do, In-Progress, Done.

I know I can do this with a drop-down list, but I wonder if it is also possible to do with Tags? Maybe with a script?

Edited for clarification.