bueno eso es bien simple , cuando instalas el apache ( servidor web ) ahi le pones tu ip local o lo puedes hacer modificando el httpd.conf
# ServerName gives the name and port that the server uses to identify itself.
# This can often be determined automatically, but we recommend you specify
# it explicitly to prevent problems during startup.
#
# If your host doesn't have a registered DNS name, enter its IP address here.
#
ServerName 192.168.1.1:80
( espero no equibocarme .. no dormi nada anoche por terminar un proyecto )
Saludos