Can I assign a project permission to "Any user with an assigned role"?

[Hugh Macdonald]

I'm setting up permissions on a project, and I'd like to be able to give the "Browse Projects" permission to any user who has an assigned role on that project. I could specify each role, but if I then created a new role at a later date, I'd need to ensure that I'd edited the permissions to add it. Whereas having "any assigned user" means that any user linked to that project would immediately have access to that permission.

[Joe Pitt]

No, assigning the roles is the only way. I have a role 'project user' that I give most of the permissions to including browse, create, edit, add attachments, etc. Everyone working on the project gets that role. The 'special roles' like tester, developer, QA, and such are used as conditions for workflow transitions.