I've studied there last semester but im back home in Germany again. I know a few people from freeskiers.net are living in Vienna. They are mostly skiing at Schladming or Semmering which is like a 1 hour drive.
When i was there i was searching for other skiers and i met a few at Uni and the guy working at Blue-Tomato (Snowboard/Skate/Freeski Store) was pretty chill aswell. Never got around skiing with them though because i moved back to Germany but you can definitely find people who like to shred there.
Freeskiers.net is a Germany based website about freeskiing, touring etc. (could be compared to TGR)
I suggest you make an account there and create a thread. I remember the members "Vinci" and "flo12345679" are studying in Wien and really are down to ski.
Hit me up with any further questions.