Mnova is available for Windows, Mac OS and a number of Linux distributions, and multiple user licenses across multiple platforms are perfectly possible.
Even a single user license with 2 installations (e.g., desktop computer and laptop computer) on 2 different platforms is possible. Our efforts to develop a multiplatform software are precisely focused on the idea to allow research groups with multiple operating systems to share a common application and file format.
The price of the licensing is the same for all OS, and the licensing system is also multiplatform, therefore there is no reason why users could not have a multiple user license and deploy across several platforms. Just download the distribution you want to have and follow the licensing process.