If on the “Report” entity you check the System Member for Owner, you can access the attributes of the creator of the report.
On the report page then you can use the connector to go over the association to the “Owner”.
If you select the specialization Account you can access the Email of the creator and show it on your page.
Please be aware, entity access is here applied. So if a user has access to the page, but not has access to the Account entity that is not his own, it will throw an error.