No sorry, it is not a social site like the Facebook or twitter where you can send direct msgs to someone.. You can only ask questions, answer others questions and comment on others answers. There is no a chatting box or something like that, but you can communicate and talk with someone here through the answers and the commenting but it is not private as any one in the community could see it.
You can't send messages on here at all. It's a question and answer site. But, you can talk to people in the comments section or answer their questions. This is not a social media site, but we manage to follow people we like and talk to them some through comments.