yes...however if all of them are running 'home' then your going to have issues with the file transfer. example: john needs your picture file cause he likes your backgrounds, you click the button to share, he looks for it, sometimes this wont work, it will give an error that computer cannot be found.
However if just one 'pro' is on that network, all is well. It resolves all the IP problems.
As far a using the network for a common internet port, then you wont have a problem, its the PC to PC stuff.