Is it possible to block websites on a specific computer on a wi-fi network?

[D]

My sister has been posting nasty things about me on Facebook and I want to block her access to Facebook without her knowing - i.e. make her think it's just down temporarily.

I tried to do it on the router but it blocks it for me as well.

I have Trend Micro Internet Security PRO.

How do I do this?

[EINSTEIN]

It depends on the type of wi-fi router you use. I know that Linksys and Netgear routers do let you block specific computers (based on their MAC addresses) from reaching specific websites. Check your router's configuration manual.

[globeweasel]

look in windows help

[Michele C]

Why don't you say something like: Knock it off, or I will start posting about YOU!

That should make her think about it.

[Zhao Wu]

try this smart parental conttrol software.
http://www.monitoring-softwares.com/pare...tware.html

[Adrian]

Without loading software on her computer, you may be stuck. Since both of you are wireless, you cannot block a site in the router without blocking everyone, at least with the router you have.
Or, contact Facebook, and complain about a user saying bad things about you, see if they can block or disable her access....