I need to restrict author access to a particular content category. Can this be done with Joomla 1.5.15 site and CBSubs1.2.2?

I have created a group called 'authors' that have access to write content for moderation. However I don't want them to see all sections and categories from Joomla's 'add content' screen.

Can CB help me to control the sections/categories they have access to when creating content?

Thanks in advance, Gerry