> Why not use kiosktool from inside KDE (If you are using KDE that is)?
>
> http://jriddell.org/programs/kiosk-article.html
>

I actually use gnome, and by the way from what I read I couldn't understand
how to get the functionality I was talking about (prevent an application
from gaining access to the network while having the network functional for
the other applications). Thank you anyway, bye.