how to set cutome category to disply posts?

Howdy. I just updated the plugin and added a filter, ‘cd_fa_post_query’ that you can hook into. The example below would only show posts by the author in the red category.

function example_featured_author_post_query($query){
	$query['category_name'] = 'red';
	return $query;
}

add_filter('cd_fa_post_query', 'example_featured_author_post_query');

Its a standard argument array used for WP_Query class so you can use any argument you need.