PHP Code:
order allow,deny
deny from host.name.net
allow from all
will ban users with any ending hostname "host.name.net"..
That is both d93e4a5F1.host.name.net, xxxx.host.name.net or yyyy.xxxx.host.name.net will be banned..
However I dont think banning users via .htaccess is a good idea. You may have only 1 user from that host at the moment but by banning him in .htaccess, you ban your prospective members too..
I were you, I would regard hacks like Hell-ban
Regards,