>>Unless you have some compeling reason to honor this request, I would not do it. The client should know how many users they have that will use the system - stick with the per seat.
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>I would like to do this Wayne, but I can't. It's a big client and it's a multi country implementation. They have people using the soft once every 2 week and they don't want to pay a licence for each. I really need to find a pricing reference elsewhere to back my increase and propose something.

Based on this info, I amend my comment on determining the price per connection. This sounds like they have perhaps hundreds of computers verses wanting a handful of concurrent licenses. Let's just take a simple example here. They want to install your software on 100 computers but only want licenses for 10 concurrent users. You can not multiply your price by 10 because this defeats the purpose of this type of licensing.

Instead of coming up with a price per connection, why not negotiate the overall pricing structure with them [site licensing] including a monthly retainer fee for support. Make sure you consult with an attorney to protect your rights and product. This sounds like it could be a very profitable sale for you if handled properly.

Hopefully JVP will jump in on this one with his legal opinions.