This brings up the rule form. The rule form contains the parts. Select the field on which you want to base the rule from the first dropdown. In the second drop-down, select the comparison method in the third drop-down, and put in the value. For example, you can create a group named “google employees” by selecting “email” on the first dropdown, “contains” on the second dropdown, and putting in the value “@[google.com](http://google.com)” in the third field. So all attendees with email addresses containing @[google.com](http://google.com) will be added to this group automatically.