Is single post navigation possible with this plugin?

Hi @elahwyhw23,

What you are describing should be possible with a custom snippet in WPCode.

You can try something like the code below (replace with your category ID) but be aware that if a post has 2 categories and one of them is blog it will still be excluded.

add_filter( 'get_next_post_excluded_terms', 'wpcode_custom_exclude_all_terms_but_blog' );
add_filter( 'get_previous_post_excluded_terms', 'wpcode_custom_exclude_all_terms_but_blog' );

function wpcode_custom_exclude_all_terms_but_blog( $term_ids ) {
	$excluded_terms = get_categories(
		array(
			'hide_empty' => false,
			'fields'     => 'ids',
			'exclude'    => array(
				1, // Replace with the id of the category you want to include.
			),
		)
	);

	if ( empty( $term_ids ) ) {
		$term_ids = array();
	}

	return array_merge( $term_ids, $excluded_terms );
}