Logon Screen on Startup

I have a couple of users linked to Zinc. My account and my Kids account. (Might add a 3rd one for the wife)
The only problem is that the only way to switch to one or the other is by going to the hidden menu screen then logging out and logging back in again.

I would like an option in the settings menu.
"Show logon screen at startup?" This way I could easily choose the user I want at startup instead of having to go through the menu.

An option in the menu is ideal because not everyone has more then one user.
This way only people with multiple users would see it.