Show only specific categories

Hi –
We use Ecwid already with Joomla and we are able to have a main menu item link to a specific category through a plugin. I’m trying to work with WP and the plugin and I dont want the whole store to appear as I am only interested in one or 2 categories per menu item. Is there a way to only show a specific category with this plugin?
thanks!
M

NOTE: I do see that I can add 1 category, but I would like to do this with multiple categories 🙂

http://wordpress.org/plugins/ecwid-shopping-cart/