You can with a template-custom but it’s not very simple.
Have you tried to create a shared folder, than replace the directory with a link to your folder?
By the way, what’s the purpose? Maybe there is a better solution
Not tested completely but i guess that if you use an ibay as the content of your web site you can share it on the web and share it on your local network with samba users.
In fact with neth you don’t use /var/www/ for your root apache folder, you should use an ibay