sure it can

all you have to do is mount the nas with a given mount point
for instance an nfs server would be
mount -t nfs server:directory /mountpoint
or put a line in /etc/fstab
server:directory /mountpoint nfs defaults 0 0
then create a virtual host in apache with the name of the website as you want it to be accessed (eg
www.example.com)
with the document root as /mountpoint
the easiest way to do this would be to download webmin from
http://www.webmin.com and installing it
this provides a nice web interface for configuring the above