gistfile1.aw

<?php

add_filter(
	'blocksy:pro:content-blocks:condition-match',
	function ($matches, $content_block_id) {

		if ($content_block_id === 15054) {
			$resume_id = get_queried_object_id();

			if (! resume_manager_user_can_view_resume($resume_id)) {
				return false;
			}
		}

		return $matches;
	},
	10,
	2
);

This is fantastic! The specific Content Block filter used is re-implementing the "View Resume Capability" setting of the WP Job Manager Resumes addon to a Content Block that is overriding the content-single-resume.php template file of that plugin. However, I can see how any content block filter can be added inside the callback function passed to the add_filter function. So this is also very useful across many other similar situations where we will want to add a filter to any Content Block for any reason!

I put this code in a content-blocks-controls.php file in the child theme and removed the content-single-resume.php template override from it. The view resume capability for the Content Block is again controlled by the WPJM Resume's setting.

Chef's Kiss Guys!

@indigetal I'm glad to hear we found a solution!