What is webfilterdnsd process? What is webfilterdnsd process running on my machine? Its started by user "nobody". Not able to find any other information on it online. How can I get more information on processes running on my mac?
Although it doesn't answer your question directly, the excellent

http://triviaware.com/macprocess/all

is a web resource that describes many Mac processes. 

It describes webfilterDNSd as:

"Process is part of clean OS X install however there is no description available from credible sources at this moment. Use supplied link for related google search."

There's a comment section by which others that know might be able to answer your question.