Most internet websites, such as HN only require an email address to register, beyond that they are totally anonymous and indifferent to the country of origin, religion, gender etc. of their poster. The only hard requirement is that you need to speak English somewhat well, and be interested/willing to join in the discussion (of typically nerdy topics).

I'm not sure what are the actual demographics of HN, but I'd be curious to see what is the actual national makeup of people who post here. Probably more info isn't really possible to collect considering the limited data the site has to work with.