Yes, you can the user name on any Guest account you've created. To change the login name for a specific Guest, follow these steps:

1. Click on the Settings icon in the OPTIMAL toolbar.
2. On the Guest Accounts tab

3. Locate the Guest whose password you want to alter and click on ther account number in the Account column.
4. Change their login name by editing the Login Name field.
5. Click the Save or Modify Account button.