"Can I just send a reply/message to the person who posted something? I only see how to post to the public. Thanks."
If you are receiving forum messages by email
You can find the author's email address in the email "from" field, which you can then use for your reply.
Exception: Yahoo! addresses are modified to end in @forums.e-democracy.org to resolve this issue. If you see this type of address then you must use the following method.
If you are reading messages via the web
Log into the website and then visit the author's profile page to REQUEST CONTACT. See the attached screen shot.