When you export the interview to a CSV, you can filter on the assigned interviewer so that it groups the assignment.
For example, once you've built the schedule, added the details to the slots, you can choose this option to Export Interview Schedule:
This will download a CSV of the interview schedule- where you will see these basic headers:
You can select the Interviewer column and then filter on the contents:
We filtered here:
Which now enables you to customize the filtering in that column: