To create a segment based on a campaign,
Select the option Segments from the Lists dropdown. This will open the Segments Window.
Click the button Create New Segment.
Select the option to create a segment from a campaign
Then enter a segment title.
Finally, select the campaign upon which you wish to base the segment.
Click the button Next to continue.
Once you have selected a campaign, you need to filter the campaign for those subscribers you wish to include by selecting a match type (condition) and a data point against which you wish to match subscribers (i.e., by email, first name, last name, or any custom field you have added to the list).
For more information about Subscriber-based and Activity-based filters, see the support topic “How to Create a Segment.”