I know we're still working on 7.2, but expanding the permissions is something that's slated for 7.3. I was going to try and sneak it in for this version, but it requires some pretty big control panel changes for the direction I'd like to go. So, while it's not something you can currently it is definite something that is scheduled to be put in.
P.S. It's very hard to type when the wife makes you spend the entire day putting in a new garden
