Currently, if you copy a piece of copyrighted software and use it on two home machines at the same time, it is a legal violation.
If it's illegal, it's piracy; but I think it's a stupid law, and immorally using gov't to support monopoly prices for the developers/distributors.

If you expand the legal definition of fair use to include this, then almost certainly you'll get a tiny bit more copying than is now done; and elliminate that whole amount of piracy. Meaning most home users with multi computers pirate copy it now, and would merely copy it in the future.

(I prefer more radical reduction of pirate copying -- make all copying legal.)

But I'm curious why none in your small company aren't more seriously investigating Linux and open source?