My Ubuntu machine is on the network accessible at \\linux-server
I have Apache2 installed and if I go to http://linux-server
it takes me to /var/www
as the root directory.
Is it possible on the same machine to set it up so that http://jisaacks
points to /var/www-jisaacks
One method is to use the NameVirtualHost directive.
There is a howto here : http://www.debian-administration.org/articles/412.
This article should help you.
I think you're looking for Virtual host. Check out http://httpd.apache.org/docs/2.2/vhosts/ or search for a how to article.