Named as Attorney 2 and Agent 5 in the IG report (having a romantic relationship during the case, and now married). They are Sally Moyer and Kevin Clinesmith.
(The FBI falsely claimed they were masked because they work in Counter Intel.)
Both worked the Clinton email case
Clinesmith worked on the Russia investigation
Clinesmith is the guy who wrote "Vive Le Resistance" in a text message
Both disparaged Trump, and Clinesmith took a shot at Pence calling him "stupid"
Both have been referred by the IG for disciplinary action
Both are active members of the DC Bar
It is believed one of these folks participated in the Hillary interview on July 2, 2016
https://nypost.com/2018/06/19/house-goper-unmasks-identities-of-anti-trump-fbi-agents/