First of all, I read at least 20 articles about this topic, and not one of them can match up the scenario and I screwed up the process numerous times. So I turn help by offe
and then go to control panel > system and security > windows firewall and turn windows firewall off
now you can access your wamp server from another computer over local network
by the network IP of computer which have wamp server installed
like http://192.168.2.34/mysite