Yes, you can run Adsense along with Kontera. I have been doing this for about a year. Kontera is a nice supplement to my Adsense revenue.
Actually, Kontera is contextual - but since Adsense updated their policies a year or two ago, that no longer matters. you can run any other ad-networks with Adsense, contextual or not, as long as those ads cannot be confused with Adsense ads (ie; as long as they dont look the same)..
I think google allows it but it wants you to keep some difference between the two. One should not misunderstand kontera ads as adsense ad.
I believe there is no hard and fast rules in this regard. Adsense and Kontera can be used in the same site. I have seen many examples.
Yes you can dear All my fully developed websites has adsense and kontera in it since last 3 years Currently running on 4 of them