Different levels of access to a wordpress install?

Is there a way to allow different levels of access to a wordpress install?

For example:

A wordpress site has 9 posts
Level A can see maybe only 3 posts.
Level B can see those 3, plus 3 more (6 total).
Level C can see all 9 posts?

Thanks in advance, and I apologize if this is already answered (searched and couldn't find the answer).

Bill

Use Ken's amprotect plugin.

This will allow you to set:
3 posts which allow level A,B,C access
6 posts which allow level B,C
9 posts which allow level C

etc..

David