When a device, tag, or zone is created, the owner is set automatically and is represented by the user account of the user who created the object. Information about ownership is visible and manageable only by Admin role. Please be aware, that ownership can have an influence on the accessibility to the various objects, because it have higher priority in comparison to access policies. That mean even if the access policies is set to ‘No object policies’ user can still see the object of which is the owner.
If you would like to make sure that all existing objects for the specific user behave only based on Access policies, there is an option to remove the ownership from all the objects which belong to such an user. It can be found in User Management screen in “Show object ownership” (accessible only for Admin role).