Using the roles, is it possible to allow someone to access the Panel but not allow them to access the ‘Users’ area?
Currently, permissions for the panel are not implemented yet. It has been planned for quite a while, but there is not ETA when that feature may arrive in a release.
Think it could be hacked together somehow?
While permissions for other parts of the Panel are not yet implemented, you can actually already prevent access to the user section. If you give specific users the “Editor” role on their user edit page, they won’t be able to change any user data besides their own. However they will still be able to see other users.