How can I limit my Admin Users to only be able to create and edit reports for particular sites in the Pressero account?

If your admin user has the permission to "manage" reports in the admin group setup, then they will be able to manage (create and edit) and view all reports in your Pressero account. There could be times that you want one of your admin users to create and edit reports only for one (or a selected number of) site(s). To do this you will want to add that admin user as a site user in the accounts you want them to manage. With permission to manage reports on the site level, they will be able to add new reports and edit them from the individual storefronts. 
                           Ch. 020. Admin Users