It's not really legalese at all, Bondware outright changed the wording to lease from license when they updated Poser to call their servers for authorisation. A lease implies a specific time of rental of something. If you look at your licensing agreements when you install something, they say you own a license to use said software, not a lease. You would only have a lease on a subscription model, because then you are renting it for the period of payment.

In fact, look at the screenshot for Poser 11.3 installation and see how it says license and not lease. In reading through the entire EULA the word lease is used once, in the Program License paragraph where it says 'you will not relicense, sublicense, rent, lease, or lend the Program for third-party training, commercial time-sharing or service bureau use'. Also, nowhere is it mentioned in the EULA that internet connectivity is required after initial installation at times in order for the program to re-verify itself, you would only find that out later. But there we go.