i don't know how can it b possible.,but a suggestion,u can set your all menus only for members,and then guests can't see links to members page.(but they still can access that by typing the url of members page on the adderess bar of their browser)

This is an important feature that is needed in a social site that members can make their information private and only friends can see certain info and members see other info that is made public. In the meantime set landing page to splash page and then the Join page that way only site members can see content. Not a good fix but until Oxwall introduce membership levels of privacy maybe that will work.

Hello guys!
Yes, you are right. Privacy is the on of the major features for any social sites. We understand it well. That's why privacy is already on our roadmap. Will be released soon :)