Looks like our employees's club got interested in TG.

To that end I need an answer to a very specific copyright-related question. If our employees' club indeed follows my suggestion and decides to purchase Terragen to put it into their "computer graphics studio" offer, should they buy several licences for all computers that will use the program? Or perhaps it is sufficient to purchase just one copy and install the software with all computers that will be used for that purpose?
I don't really know how that works cause I never needed to buy any software for more people than just me.

What the licence issues look like in this particular situation? Also I would like to know if there are any discounts in a case where the first scenario (buying multiple licences) is correct?