You can set the maximum number of simultaneous connections emanating from a same IP address at the Site, User Setting Level, and User level.
The Site level sets the limits of the user and User Setting Levels.
To set maximum connections per user account at the user and User Setting level
In the Administrator, connect to the server, then click the Server tab.
In the left pane, click the User or User Setting Level you want to configure.
In the right pane, click the Quota tab.
Select the Max connections from same IP check box, then specify the maximum number of simultaneous connections to the Site from the same IP address. A gray check mark indicates the selection is enabled at the parent level (User Setting Level or Site).