Restrict access to posts and pages

First I will say “hello” because it is my first post in this forum.

Second - Is there any way to restrict access to some products and pages, so it can be seen only by specific users (members of a group)? Is there any addon for this purpose?

Thank you very much.

Edit: I'm sorry, I just tried the demo when I asked. I installed the trial version and found that the answer is “yes”. Thanks guys!