Custom TCA Attribute in Match Rule - LOV?

Hello,

I have created a custom TCA attribute per instructions at: Data Quality Management: How to Create a Custom DQM Attribute (Doc ID 353562.1)

I've added the attribute to a TCA match rule (the one I use for customer searches -- HZ: Match Rule for Organization Simple Search).  The rule works as expected; when I navigate to "Customer Standard" (ArPrtySrchPG) and run a search with a value in that field I get the results I expect.

However - the field on the framework page is a free text field.  I'd like it to be a drop-down with a list of values.  Is there a way to accomplish this?  I have not found that answer on metalink or online or in TCA Administration Guide.