Those distinctions have absolutely no basis in reality.
Censorship is merely the act of limiting access to information. It doesn't matter who is doing this. Yes, governments often do it, but so can private entities. An individual can even do it to himself, in the form of self-censorship.
Moderation is the application of censorship in order to modify a discussion. Once again, anyone could potentially do this, including governments. An individual can do this to himself, too, by selectively choosing which parts of a discussion to consume.
I've been timed out by dang for inciting flamewars, I took my time out like an adult and learned to improve my communication
If you don't like the moderation policies of HN, there are plenty of other places you can make comments. Continuing on your "censorship" opinion is likely to earn you more downvotes and flags from other users
Moderation is a private entity activity