Is there a way to create a category where only staff and the user who created the page can see contents?

Hi Christian! Yes, as follows:

• Create a Private Support category.
• Remove themaySee permission from the Everyone group, in that category.
• Create a support_group, and grant it both maySee and maySeeOwn on the Private Support category.
• Add support team members.

Now, everyone can see only topics they started themselves — except for the support_group and mods & admins who can see everything.

the issues in here would be created via the API (users filling out a feedback form)

I think that'll work as long as the author of a new page is the user who filled out the form. When you create pages via the API, can you already set the author to the correct person?

I tried to set this up via permissions in the past but couldn't get it working

In the past, this wasn't implemented, but in September 2024 I see I've added an automated test for such private support configurations. (tests/e2e-wdio7/specs/perms-see-own.2br.f.e2e.ts)

I should code review that e2e test. There's a note CR_MISSING at the top, I've forgotten / postponed to code-review it. I'll message you once I've code-reviewed it. Not impossible that I'll find some problem.

Here's a screenshot that shows the configuration described above. It's the /-/admin/inspect page, where you can see how permissions have been configured on "CategoryA", which functions as a private support category (this screenshot is from the automated test mentioned above).