I think the post was by "eru"

I base this on eru's phrasing and use of "dissimilar" in the post in question, which can also be noted here:

http://news.ycombinator.com/item?id=1159200

My strategy was to look for unusual words and phrases and do a google site search for those phrases.

Additionally, eru's post in this thread indicate an interest in privacy and eru's activity pattern is both frequent, and recent which I would expect to be true for the poster.

edit: Here, eru even taunts us a bit: http://news.ycombinator.com/item?id=1200060