Module only on Item pages; not category page

I'm using News2 template with NSP5 and K2.
I want to place a new NSP5 module on item pages in a category but not the category page itself. Is this possible? At present it shows on all the item pages in that category and the category main page as well.
I want:
Category page --new nsp5 module does not show on left side here
Item 1 --new nsp5 module shows in left side
Item 2 --new nsp5 module shows in left side
Item 3 --new nsp5 module shows in left side

Hello,

Unfortunately it is not possible without creating menu items for every item in these categories. Every article under category is connected with category menu item if it doesn't has own menu item.