Has anyone bothered to ask the question of "public domain for who?". I would assume that works created by the US taxpayers (via the government) would be public

Has anyone bothered to ask the question of "public domain for who?". I would assume that works created by the US taxpayers (via the government) would be public domain for US citizens, but is there a clear cut definition of them being public domain for non-US citizens? I can think of several restrictions on such things (such as crypto), that prove otherwise. If that's the case, does Wikileaks count as a US citizen? I'll admit, I'm completely unfamiliar with the makeup of the organization outside of Julian Assange (who is not a US citizen). If Wikileaks couldn't count as a US citizen, how would they be considered as "owning the data" if the above points are true? I ask this not to be contrary or confrontational, but simply because I'm curious. This occurred to me awhile back but I haven't seen this position represented since.