Yes. Each Priority Pass membership requires a separate Username at prioritypass.com. The Priority Pass app can access only one membership, but you can logout of the app and then login with a different Username. (It is not necessary to create an account at prioritypass.com to use the physical card, rather than an app.)<snip>
Your answer is, of course, correct. That said, I simply can't resist chiming in that in this day and age, this requirement from PP to create multiple online accounts for every different PP one acquires over the years, from numerous, different credit cards, is just utterly and completely ridiculous. They really should be embarrassed.
Imagine if Amex/Chase/Citi required you to create a separate online account, with distinct username/password combinations for each different credit card you held.
Regards