The Grid's leader, who is watching the events from a Command Ship, has Sam introduced to him. As the two speak, Sam believes initially that He's Talking to his father, right before acknowledging it being Clu, who Kevin had explained to Sam as currently being "...built in my own picture." https://http-directory.com/listings12699164/5-easy-facts-about-online-scum-with-deposits-tron-addresses-described