Understood. Thank you! The only thnk i could think of would be to add the email or username next to the display name as it is populated in the form so that there is some identifying features for that individual. This would allow for "display name" routing. 

I want to be able to route to the Active Directory user, which i  understand can have two identical names, but combining the display name with the unique identifier would save an additional lookup rule per Display Name. I know it does not sound like much, but each name that is populated form a lookup table now also needs a lookup rule to identify it, which is redundant. Both identifiers reference the same person. So the trick would be gettign Forms to recognize the user through their unique LF identifier.