Custom taxonomy terms

Hi! Still a great plugin!

A question. In another thread, I found reference to using custom taxonomies and items:

‘taxonomy=’ for defining the name of the taxonomy
‘tags=desired_slug’ for defining the desired value

http://wordpress.org/support/topic/plugin-list-category-posts-list-custom-permalink-posts

However, I don’t see this on the documentation page.

http://wordpress.org/extend/plugins/list-category-posts/other_notes/

Are these parameters correct and, if so, are they supported?