I think there's no way until you use a http server which implements named virtual host (with different docroot) like apache does.
What is strange is your actual configuration. Could you tell me the configuration (and the web server name) which give you the ability to access two different docroot from a single web server running on port 80 ?
Last question : where is hosted your web server ? on the Asus or on your PC ? This is not very clear to me.
JF