If you use WhosOn to monitor multiple web sites, you can organize your sites into groups.
You can create a new group by selecting New Site Group from the Action menu using the WhosOn Server or Service Manager.
You can then move sites into the new group by selecting the site in the Monitored Sites tree and selecting Move To Group from the Action menu.
To edit group settings, select the group then choose Edit Group from the Action menu.

Here you can change the Group Name.
You can restrict the number of WhosOn Clients that can connect to sites within this group by entering the Max Concurrent Clients. This allows you to provide hosted WhosOn solutions for you customers.
You can also create Group Remote Access User Name/Passwords.
If you enter a group remote access user name/password then any WhosOn Client that specifies this user name/password in their client settings will see all sites within the group - regardless of the site-specific user name.
You can also create a Default Email Address that will be used for all new sites that you create within the group.
You can define access rights for WhosOn Clients that connect to sites within this group.
Select the Client Access tab:

If a client connects to WhosOn using a site-specific user name for any site within this group then the client will be assigned the access rights that are enabled on this tab. If the client connects using the group user name, then the client will have all rights enabled by default.
For instance, suppose you have a site in WhosOn called 'site1' and this has a site-specific user name of 'user1' (the site-specific user name is defined on the Site Settings - Remote Access tab). This site is assigned to group 'group1'. The group as the user name of 'group1'. The group has the client access right of 'Allowed To Edit Site Properties' disabled.
Now - if a WhosOn Client connects using user name 'user1' - the client will see 'site1' but will not be able to edit the site properties. If a WhosOn Client connects using user name 'group1' - the client will see 'site1' and will be able to edit the properties.