Ha-ha-ha, I was right!

The wiki says it's a some form of energy, which programs are capable of ingesting directly.

Also, the whole first film is actually a big Christian parable (I'm surprised myself), and this scene might be a reference too, but I mostly skipped my biblical classes, so I have no idea. Well, maybe it's the Baptism of Jesus (switch for Tron/user), but the glowing isn't really evocative of the Holy Spirit for me.

Or He is someone else, like Neo or Janitor.

I just understood that Olaf has a sense of humour too. This guy gets more awesome with each detail.

I've got it - it's very loosely based on Numenera. Or borrows some details, at least.

The Janitor left a script on the server that redirected the call from Neo to Ricky, if I translated the "Groundhog day" part correctly.
I guess, he was the one to decide who should get admin rights then.

#1430521, Huh? Jerry is still near the tank.

Skink, That's actually admin's aura - merely their proximity snaps the tech back into working shape.
I saw it once when he simply walked past the room.

Italian-V, Now that you mention it, I understand that the joke is obvious in English - Ricky is pressing his belly button. It's пупок in Russian, and wiktionary tells me the word isn't related to buttons.
Anyway, my respect to the author, they're making their jokes available to a wider audience.

Italian-V, The person in question has neither killed anyone, nor was killed themselves. Tron is talking about someone yet to appear later, implied (but not guaranteed at all) to be an ally.
And in the Legacy that someone was protagonist's father and Clu's progenitor.

Also, Tron was brainwashed and working for Clu as well, and now I'm suspicious. Jerry is an incompetent moron, but there might be someone behind him...