Can the automatic action Test Project Attribute read values from a Selector list?

We presently use a custom attribute "Exclude PPT notes" to select a file type definition that does not extract PPT notes. Our requesters check a box in a custom front end (not TransPort). If this box is checked, "Yes" is entered in a text field custom attribute, which the Test Project Attribute automatic action reads to set the filter type accordingly. If we move to TransPort, we would like to use selectors for this as well as other attributes that influence how the project moves through the workflow. We prefer to use selectors to eliminate typos, non-standard entries, etc., but right now this would break a lot of workflow functionality. Can Test Project Attribute read selector values?