You need to do this with PHP. There is an undocumented filter
add_filter('acf/validate_field_group', 'special_location_rules', 20, 1);
function special_location_rules($group) {
if ($group['key'] != 'YOUR FIELD GROUP KEY HERE') {
return;
}
// set conditional logic
return $group;
}
Create a field group with several rule groups (ORs) and export it so that you can see how $group['conditional_logic'] is organized. It is a nested array that holds the AND/OR logic.
