I got the same problem. Using a router tho but have set the option that port 80 requests are forwarded to my pc running WAMP. Even setting this pc in DMZ doesnt work.
As most firewalls are trying to block port 80 (the default http-port) try change the listening ports in the apache.conf to for example 8000. Restart the services and see if you can connect to apache by using [
yourip]
Worked for me partialy as i could see the wamp start up page, but couldnt connect to any of the projects. Still need some work to do on that bit..