In reply to droites:
I'd check Instagram as it's generally where Norwegians post what they've climbed. Nobody posts on twitter and there's no specific FB pages. Just look up #isklatring or #setesdal and see what pops up. I don't know any specific climbers in the area that you could follow.
I've seen one or two posts in recent years on the Bratte Rogalands Venner FB page but Setesdal isn't Rogaland so don't hold your breath. There's an Isforhold i Norge FB page but I rarely see anything posted.
Don't bother emailing VPG as mentioned above! Oppdal is about as local to Setesdal and London is to Fort William. They're 9.5 hours drive apart!