App to restrict access to the computer to time intervals?

Hi everyone,

I need an external program that restricts the access to my computer to certain times of the day just like Parental Controls do, but under an admin account. I'll explain this:

I'm using an internet filter software to schedule the access to Internet to certain times of the day and to filter the adult content and ads.

In addittion to this, I would like to restrict the access to my computer (not just to the internet) from a certain time of the night (to prevent myself from staying up late working or watching films so that I can go to bed early).

I tried to set a user account using Parental Controls, which has this exact great feature, but even though I wasn´t filtering content using PC (I already used an external app) I wasn´t able to access secure websites (e.g. Gmail) so I am back to my admin account.

Is there any program that limits the access to a computer to certain times of the day under an admin account? Ideally, it should lock the screen during the specified time intervals and require a password to unlock.

Thanks a lot in advance.

 

Thanks. I started with self knowledge and I *know* I need an app like this. Any idea?