We will look to explain it better on the homepage - Our unique selling point is the ability to create private networks which can be joined by trusted people, and for the individual, the ability to be part of multiple networks which are separate from each other. So if I am a member of a friends network and a family network, my family don't get to talk or see my friends. If I am a small business, then I have the ability to communicate with my small distributed team in a social/group like way. If I am part of a study group, I have the opportunity to share documents and research links. It is entirely possible that I might cross paths with the same people on different neetly networks, but my relationship is primarily with the networks I am a member of.
We obviously, like you say, need to explain that better on the homepage so everyone gets what it is as soon as they hit Neetly.