The Irishman was furious Spanish official Alberto Mallenco allowed the Italian side's defenders to repeatedly manhandle his players at set pieces during the 3-0 defeat at Parkhead.
After the match he rounded on Mallenco claiming he was 'very disappointed at his performance' before claiming he 'appeared to be pro-Juventus'.
Now Lennon, who has been told he will not face any action from UEFA over his comments, is keen to know why the governing body have not acted with so much TV evidence to consider.
"The referee didn't do his job," he said. "There has been a lot of talk regarding this and we are looking for clarification on the referee's decisions during the game.
"We are going to compile something and send it to UEFA and wait and see what sort of answers we do get."
Lennon also took time to dismiss Kris Commons' criticism of team-mate Efe Ambrose who he blamed for the defeat to Juventus.
The Nigeria defender played despite only arriving back in Glasgow on the morning of the match after helping his country win the Africa Cup of Nations.
Commons questioned the wisdom of Ambrose declaring himself fit for the match after he was at fault for the first and third goals of the last-16 first leg.
But Lennon claimed such matters should remain in the dressing room insisting his side win as a team or lose as a team.
"It was heat of the moment stuff. I have spoken to Kris and dealt with it internally and there is no bad feeling from anyone on that.
"Kris really cares. He was really disappointed and overstepped the line but we don't blame individual performances. We are a team and that's the end of it as far as I am concerned."
@chubbs83 - You're at it. Case in point, the penalty Dundee Utd got against us yesterday was hilarious, ha ha! Best tackle you'll see and you have the temerity to state that Celtic get soft favours in the SPL?????? Wow, you must be watching a different league mate!- damoceltic