They define it as non-simulated harm. So the difference with Dexter is that in that case the actors pretend to have been injured, but in pornography the women are actually being injured. I guess most people's definition of "acting" would inlude something liek "pretend" or "make-believe."
> From the article: A significant amount of content amounted to torture. The report warned that any kind of so-called contract was void in legal terms, because a person could not consent to torture and sexual exploitation and trafficking.
It comes down to their legal definition of consent. One can not legally consent to being murdered for example. If a movie was made where someone was murdered then that would be illegal regardless of the contract in play. In France one can not consent to being tortured or abused, and most of the popular videos they looked at showed actresses being subject to actual torture or abuse.