Members of national assemblies and governments of states; Members of international courts; University rectors; professors of social sciences, history, philosophy, law and theology; directors of peace research institutes and foreign policy institutes; Persons who have been awarded the Nobel Peace Prize; Board members of organizations that have been awarded the Nobel Peace Prize; Active and former members of the Norwegian Nobel Committee; Former advisers to the Norwegian Nobel Committee
Most of those are fairly small groups; but "Members of national assemblies and governments of states" is a pretty big chunk of people, and "professors of social sciences, history, philosophy, law and theology" is a simply enormous group of people.
As a result, nominations are very meaningless; any third rate history or sociology prof at some podunk community college can nominate someone if they have a mind to, and all sorts of people get nominated, often as a lark or to prove a point. I believe Bush was nominated repeatedly, for example. (Well...nominations are secret, but I know of people who have the ability to nominate, and claimed to have done so, and I don't see why they'd bother to lie, so...)
So yes, Snowden was nominated (well, unless these politicians are lying). Honestly, he was probably nominated dozens of times. This isn't news. Also, a couple of left-wing Norwegian politicians like Snowden. Also not news. :) The only real news here is if he wins...