Facebook Job Posts – Flooded with non-US applicants

We have a few job postings (not “Boosted” so here I am only discussing the free job posting functionality) for a Facebook Business page. Our page settings are such that our posts can only be viewed in the United States, which I hoped would apply to job postings as well, but we are being inundated with non-US applicants and inquiries. I’ve used this feature on other business pages as well and don’t remember non-US applications coming in at all, so I’m confused as to why it is a problem now. Does anyone know of any settings I’m missing that can limit job postings to specific countries?

I am aware of the fact that Facebook “special ad categories” do limit targeting by criteria like zip, but again, this is not a paid ad, and at any rate, country is not zip.