LDAP Filter

I have a LDAP server performing authentication on FR clients where EAP-TLS is being used as the mechanism, but the LDAP module is not using TLS. Is there a way to use the client certificate common-name as the UID in the LDAP authentication. I'm thinking that I just need to modify the filter statement, but I'm unsure how the statement should be structured? I hope I'm making sense? Lester Houston 111 Boeing Research & Technology Electronics Prototyping and Integration Center (EPIC) lester.l.houston-iii@boeing.com 314-234-0621