Easy way to protect a page or post

Rather than having to use shortcodes on each post or page is there a way to indicate which membership level(s) a post/page is to available? I don't see any checkboxes or anything to select membership level while I am composing my content.

site-http://www.divadance.biz"> http://www.divadance.biz
specifically I want to make all the training posts in the category "training" restricted,howver when I tried to do an URL group with the category, a person can still see the content if they have the direct link.