however there is one way to play over the internet with only one licence without violating the licence rules. use a vpn then you are (or could be) at the same subnet. this is alowing you to race against eachother but not on internet servers as you are virtually not in the internet. i don´t know if it would be possible to invite other players via direct ip to this kind of connection.
i emailed lfs the same question as 'Blakjekass' about the s2 license and below is the replay i got from lfs
"Hi,
You can play together, against each other in LAN mode. So that means, not
playing on the internet. If you both want to go online on the internet at
the same time and race against others as well, you will need 2 separate
accounts, each with an S2 license.
@all: what i was trying to explain was how they can "make a lan" through the internet so they can race eachother while not at the same place. they said they have not much money and i was trying to help `em out.
as i explained this way they would not be able to join a internet race as they use the same key. however this way they could race eachother and then share the one licence with going online at different times to race others.
if playing over a virtual lan with one licence, while not trying to acces a public server at the same time, is a violation of the licence rules, please may a mod or better a dev hit me with a big hammer.
My understanding is that a LAN game is acceptable, but VPN is VPN, and while it emulates a LAN environment in a virtual way, it's not LAN.. it's VPN.
The IP ranges that are accepted by LFS as LAN games are the standard ranges that you find in home LANs, just as described in the T&C.
I think it's great that LAN games on a single licence are permitted in the T&C. I'd hate to think that someone would actively try to abuse that, because it's a generous concession for the sake of good gaming. VPN would stretch that concession beyond the point of breaking, I think.