@xzorro Thank you for your answer!
Unfortunately, such a thing is impossible. ACF only stores the user ID in the database. To do what you mention querying the database would be very, very complicated. This means that its efficiency would be drastically low. This is because WordPress stores information in two tables – wp_posts and wp_postmeta. Increasing the complexity of the query will make such a query fail.
I’m very sorry, but unfortunately we have some limitations due to the WordPress structure and the data structure of the ACF plugin. I hope you understand this.