In Comsend you have the option to filter your member list based on any of the member fields and member activity.
From the Members menu item on the left, slide the button to turn it on.
Then add your filter values. For example you can filter for all Last Names that start with "A" AND who Didn't Sign In to the current campaign.
Once you populate your filter conditions you can Apply the filter, or clear your conditions.
After you Apply your filter you find the result set as follows:
You can use any of the Actions in the Actions column with your data set, you can export your data set, or you can select members (all or invidual) and then you can
send them all an email.