I discovered where I was going wrong. This is how I solved it

While Affected CIs tab is Active, click header column of Configuration Item. Go to configure>List Control

I choose to have admin only for Filter Roles

I did sample filter conditions on public dev

Then back to Incident Table>Affected CIs>Edit, the filter will display.

Users can add their own but will not modify the default when Affected CIs   is reloaded