By default, PrivateMembersData is private collection and each record only allows read by the member him/herself. I would like to make a few fields open, like name. In a way, I can check who else (by their name) have been registered in this website.
This is the direction I want to try!!! Now I got it: When author create a post, there will be a reference of the new post as in a multi-reference field be generated. The same time, there will be a reference field of “author” generated in the PrivateMembers collection. Then I can use this query suppression option. Thanks!!