CanCon doesn't apply to the internet. At all. It is zero percent to blame for any content site being unavailable in Canada.
Canadian rights holders have been notoriously reluctant to sign internet distribution deals. CTV and Global dragged their feet for years on iTunes TV distribution rights for a number of popular shows.
Can-Con so far hasn't been applied to the internet, AFAIK. While Netflix in Canada has a bunch of Canadian content, it's only because it's relatively cheap and in demand, i.e. due to market forces.
The real reason a lot of these services aren't in Canada (or other smaller markets) is due to regional content licensing.
Can-con is the law that a percentage of content must be Canadian in origin.
http://en.wikipedia.org/wiki/Canadian_content
I personal hold Can-con responsible for the fact that Call Me Maybe is played so often on Canadian radio.
http://en.wikipedia.org/wiki/Call_me_maybe