This is a subject near and dear to my heart, enterprise licensing.
The answer is, it depends.
However, the one thing that rarely happens anymore is tying a license to a particular machine or user. Even Windows licenses can be transfered in an enterprise license. Many years ago, some vendors tried tying the licenses to a particular item and it was a logistical nightmare. No one really does it any more on any large scale.
The real question is whether the licenses are perpetual.
The deal can be set up in a number of ways including putting a "fence" around the license with number of years or maximum total number of users. To get a foot in the door and/or a good reference, companies occasionnally do perpetual licenses. They get the big infusion of license revenue and then live off the maintenance and, possibly, additional incremental license revenue.
All of these are possible. At this point in Wave's growth, I would wager they are perpetual licenses and are completely transferable up to the maximum number of users. In this instance, we would often write into the contract that a company has to agree to be a reference account when certain criteria are met. However, in deals driven by the OEM (Dell) I don't thing this bargaining chip would be contractually obligated.