I connected to support to make sure we dont have this ability yet. hence an idea here.
Scenario: I have a department that manages multiple groups. I have a main GROUP created for my department, where I can pull all my projects and tasks reports for quick review. But, I am unable to view those for my subgroups. Please note--I can add this field at project custom form to add into report. But, I would recommend to have this field (taxonomy) added under Project Setting section, where we add our portfolio, programs, Project managers, sponsors etc. I am system admin, and i dont see this option to add by myself.