Hi @Graphx
I’m not 100% sure this will make it into the core due to the ‘post template’ being a plugin, not a core function of WP.
That said, someone has already written the extra location rule code for you!
https://github.com/lukechapman/custom-post-template-support-for-acf/blob/master/acf-custom-post-template-support.php
Good luck
E
