Active Roles

In several servers now, I (and others) have faced the problem of deciding which roles should be higher ranking, or which role we would like to be labelled as. I think it would be nice to be able to set certain roles as equal to each other, and anyone with one or more of those equal roles can set one of them to their "active" role. So, if someone is, say, both a "Chef" and a "Gamer", they could set their active role to "Chef" when they are in the Cooking channel, and switch it back to "Gamer" when entering the Gaming channel.