Searching for Plugin: New posts/comments since last login

Hey.
We are 5 authors working with one blog. Now I’m searching for a plugin which should have the following functionality:

e.g.: Author A leaves the blog by using the normal logout button. During his absence 4 new posts and 8 new comments were written. The next day he logs in.
I want to have a Plugin which shows Author A the new posts/comments which were written during his absence/since he were last logged in. Idealwise the new posts/comments should be shown in two separate widgets.

I looked through hundreds of plugins and I’m aware of the following plugins: WP Since Last Visit, Recent Comments and New posts popup.
But none of this plugins does use the login/logout function to show new/unread comments and posts.
Does anybody know such a plugin?