Vietnam’s new cyber security law draws concern for restricting free speech

This law calls for companies like Google and Facebook to store data in Vietnam for Vietnamese people. Presumably the Vietnamese government would then have free access to it.

Would I be right in thinking that Facebook and Google wouldn't comply with this new law, and get blocked instead, like in China?

And how would it be determined who is a Vietnamese user? If I've never been to Vietnam but talk to Vietnamese people on Facebook, could the Vietnamese government get access to my data in the event that Facebook complies with these laws?