How can I restrict internet access for one user?

We have several PCs in our office, all connected to one Domain (Win2k3 server). There is one user who spend most of the time using myspace.com in working hours even after telling him not to do. So, as being the Admin, I want to block this specific website on his specific computer. I mean, he should not be able to open myspace.com any more on his pc. Is that possible? So far I tried doing this by adding the domain name under Content Advisor but is blocking many other websites as well.

Any help will be appreciated. Thank you.

The very first thing you need to be concerned about is progressive discipline. Employees who refuse to follow the company rules, guidance, orders should be disciplined and/or fired.

Apart from this if you have not setup Internet usage policy so far, than it is the time to do so. Other than this, you can go for any Internet Filtering Device.

I have been doing this since long time on my personal PC to restrict my kids visiting porn or any such illegal sites by editing the host file. So you can do the same on his computer in his absence. Just ad 127.0.0.2 myspace.com to his hosts file and you are done. Or alternatively you can just drop all myspace.com traffic. It will work.