JQL filtering option for you to target a group of recipients. e.g. Issuetype != Development, Component = Support, Labels = Important, etc...
Select the Jira project that you want to configure CSAT
Click on CSAT button on left navigation
Click on Configure CSAT
Filter by JQL allows you to choose the conditions of the tickets you want to send the survey. e.g issuetype=task tells CSAT survey to send the surveys to tickets that are task issuetype
status=resolved AND assignee=captainjoe
issuetype in (Improvement, "New Feature", Story, Support) AND status = Resolved
Use Jira Issue search to validate your jql results before copying and pasting into CSAT Filter by JQL box