Redmine

I'm in the situation where I've been given different roles. Currently, this means that Redmine grants me all the privileges that come with the different roles I have.

I would like to be able to select one role from the list of roles I'm allowed to take. This way, when I'm wearing my Developer's hat, I'm only granted the privileges associated with a Developer. But when I'm wearing my Change Control Board hat, I'm given more privileges (e.g. change the status of an issue to OnHold, which a developer is not allowed to do).