Dunno if there is an offical font of Tron Legacy. At least i created one, based on screenshots i found so far. That said: this font is not fully complete, a few char are just estimated from my side. If anyone has some screenshots, with various characters shown, i would appreciate if he would share these.
In the meanwhile, here you go with the file: Tron Legacy Font 1.1a
(This is a TTF Font set, so your system must support it (windows does))