The access password allows anyone who knows the password to post on the account. Once you've entered the password using your machine, a cooke is then set to remember that you know the password, so that you don't have to keep typing it in every time you post. This will allow you to use any name you want to, up until the session is over. You can also set passwords for indivudual names if that's a better option fo you. Finally, on some forum software we also offer features that lcok the name posted with to the name of the ologged in user, so if your shoutbo is on a forum, that may help you out a little as well.