ContentWasher 5.19
This function allows you to set restriction on using the computer by specified date and time. For example, you may specify such rules: "it is allowed to use the computer only at work days between 4:00PM and 9:00PM", "it is allowed to use the computer starting from 4:00PM but less that 2 houres at day", "one session at the computer is not more than 1.5 hours and with the break 1 hour", "it is not allowed to use the computer at tuesday", "it is not allowed to use the computer if it was used more than 15 hours at a week",...
Such rules are specified for every computer user separately. Or you can group some users in one group with the same rules.