Assuming that you have an account on the Hyper-G server you are connected
to, you may identify yourself to the server by using the Identify button:
You are then logged in to the Hyper-G server as an identified user, which can be verified by looking at the 'who-is-online-list' (see the Status command in the Options menu).
Identification extends your access rights: for example searches often result in more matches.