Limit who can be assigned ticket on per project basis

[LikeableHades]

Is there a way to limit who can be assigned to a ticket on a per project basis?

I have a number of users who are administrators, but may not be involved in a specific project and therefore don't want to be assigned anything. I know I can remove assigning of administrators as a whole, but is there any way to create a per project whitelist to determine who can be assigned? Or a blacklist?

[cas]

Available out of the box, give people a specific role per project. (please limit the number of administrators to the site, having too many is a bad idea).

[LikeableHades]

Makes sense. We'd have to redo permissions in that case though, but not a huge deal.