Can I find what computer (not IP address) a facebook post originated from?

[T Mc]

So I think my cousin stole my grandmothers laptop computer, I confronted him and he denied it. I'm not sure if my mother or grandmother used it to post on facebook or not (my mom, who uses facebook, usually uses another computer). But if either of them had, is there a way to identify this information? Thanks for any help or suggestions I can get.