If obscene material is published in Canada, then the Criminal Code is invoked and a charge could be laid. Then those words like it's against the law to make, disseminate, or provide would apply, and you'd have to find someone on Canadian soil, I suppose, who you could charge. If there was someone internationally, then I suppose Canada could engage Interpol. It gets a bit more difficult when you have perhaps someone who's committing a crime in Canada but not on Canadian soil. That can be difficult, but technically, yes.
I think a lot of what Mr. Viersen is talking about is already against the law. It's just a question of its not being enforced.