I was searching abut this topic, and I found this blogpost.
Under the "Jira Platform" section we have "Filters: Add individual users as viewers", which is the feature I was looking for. It also says that "Changes in this section usually apply to all Jira products". However, I looked at the release notes of Jira Software 9.4.x and I can't find anything related to that.
Is this feature only available in Jira Cloud so far? Are there any intentions of including it in Jira Data Center?