[ceph-users] Bucket policies with OpenStack integration and limiting access

Good day, We have a Ceph cluster and make use of object-storage and integrate with OpenStack. Each OpenStack project/tenant is given a radosgw user which allows all keystone users of that project to access the object-storage as that single radosgw user. The radosgw user is the project id of the OpenStack project/tenant. Sometimes we have use cases where we want to access the object-storage outside of the swift-api and use tools like the aws-cli or homebrew java applications to access the object storage. For this use case what we do is generate S3 access/secret key for the specific radosgw user and they have full access to the object storage for that OpenStack project/tenant. What we want to know is if it is possible to provide granular access to containers within a single OpenStack project using S3 access keys or S3 sub-users? I know that the Swift API has ACL's that can limit by keystone user but we are exploring the possibility of doing this using S3 and S3 bucket policies so that the tools our team are developing (open source) are more transferrable to AWS S3 and Rados GW. Thanks all, Jared Baker Cloud Architect, OICR