Restricting access to specified times

Hello!

Is it possible to restrict the remote access that a user would have to a computer to a certain time frame?

I would like my employees to have access only during business hours. Right now, I have to disable them at the end of the day and enable them again the next day. Is there a way to automatically set access, for example, to 9am-6pm M-F, and restrict access outside of working hours? Or do I need to keep doing it manually?