Project is sold per machine/user. Check the license agreement, I am almost
certain that any user who sits at the machine where Project is installed may
use the product without violation of the agreement.... then again, I don't
work for Microsoft.
If you want to install it on two machines, you may need to simply purchase a
second copy. Again, refer to your license agreement -- some Microsoft
products allow installation on two machines if Machine 1 is your primary
desktop machine where you are the sole or majority user. On some products,
Microsoft allows a second installation on a Laptop provided this laptop
machine is assigned to the same person as License #1 and the laptop is used
the majority of the time by the same user. In all cases, it is a violation
of the rules to have both copies running sumultaneously.
It's all in the fine print. Hope this helps -- license agreements can be
viewed somewhere on microsoft.com