I am running Checkpoint Secureplatform NG AI R55 with HFA04 to protect my LAN. Everyone behind the LAN is "hide" NAT to the firewall "external" interface when going out to the Internet. I would like to be able to block users from surfing the Internet when using Microsoft Internet Explorer (due to the recent security). They can only surf the Internet if they use Netscape, Mozilla, slim browser or Opera. Is it possible to do that in NG AI R55?