Hmm...thanks for the tag, @The_Real_Melinda_Layten,
I'm not sure if Workfront has plans to create such a "Security Grants" audit on their roadmap, but if not (since this sounds like a useful idea to me) would be interested in chatting further with you (or others who might care to comment here) about creating a Security Grants solution using our Magic Reports technology.
Regards,
Doug