add_filter( 'frm_denylist_data', function( $denylist_data ) {
	$denylist_data[] = array(
		'file' => 'path_to_denied_urls_file',
		'field_types' => array( 'url' ),
	);

	return $denylist_data;
});

Use this code example to skip the custom disallowed words settings for logged-in users and checkbox fields.

add_filter( 'frm_denylist_data', function( $denylist_data ) {
	$denylist_data['custom']['skip'] = is_user_logged_in();
	$denylist_data['custom']['skip_field_types'] = array( 'checkbox' );

	return $denylist_data;
});