Note: Please also see the following article for an explanation of using "Tags" to further group or sort devices within a Network:

You can specify a "Network" when scanning devices into Active Advisor.  Unclassified devices will default to an "Uncategorized" network. You can edit the name of an existing network by selecting the pencil icon, change the name, then click the pencil icon again to save the change:

You can also move devices from one Network to another by selecting the device(s) and then pressing the "Networks" icon near the magnifying glass icon: