controlling printing by password
I teach autistic children, some of whom have an obsession with printing certain pictures, which I let them do as a reward once they have finished their work. I need a simple way to control their printing. I have used a program called printlock (first post so I can't link, but first fine on google) which simply pops up a password dialogue box when something is sent to print. This is perfect when it works, but is unreliable and now has stopped working entirely, and the developer is now ignoring my emails!
This might be a rather newbie question, but does anyone have a simple solution?