Is there an S3 policy for limiting access to only see/access one bucket?

Question

I have a simple bucket that looks like images.mysite.com on my S3 and other buckets containing backups, etc.

I want to allow a specific user to be able

Answer 1

No, it's not currently possible to limit users to view selective buckets under root or anywhere else. You have only those 3 options right now.

I chose to ask the client to use the bucket name explicitly.