Add a css class to Ultimate Member restricted content article div container.

um-css-class-restricted.php

<?php

add_filter( 'post_class', 'um_add_restricted_class_css', 10, 1 );

function um_add_restricted_class_css($classes){
	global $post;
	$restriction = get_post_meta( $post->ID, 'um_content_restriction', true );

	// if the post is restricted do this.
	if ( $restriction['_um_accessible'] == 2 ){
        $classes[] = 'um-restricted-content';
	}

	return $classes;

}

Thanks for this. Do you know of an option to add a class which will signify if the user is allowed to view the content or not?
Something like: 'um-restricted-content-allowed' for a user who is allowed to view the content.