You will be proposed job offers from «Pôle Emploi», the unemployment office. The job will be "within your abilities" and in a certain distance from your residence but in practice, Pôle Emploi is known to send pretty much random job offers to people. They have something like 50 categories for job seekers and job offers and make matches automatically.
After two refused job offers, your unemployment benefits will be discontinued.
Programmer and cook are probably in different categories, but there is no way for someone to say "I don't want to work with meat" like the comment I answered to suggested. As a programmer doing robotics, I made the choice to refuse military jobs but I know that in France that's more than 50% of the jobs in the field.
I would not be 100% sure that sex workers would be put in a different categories than "entertainers" making it plausible that an actress would be proposed a job in a porn studio.
Thing is, a member of a porn studio reacted to this scenario: he basically said "we know Pole Emploi does not filter offers at all. Porn acting is very specific, the last thing we want is to force people into it. It would be contrary to our work ethic and probably to the law."
They know they would be blamed for it, so the unlikely part is that they would post such an offer. If they did, however, it is likely that it would be send inappropriately.