Yes you can but not simultaneously.
Our products use a floating license system which allows users to use their license on different machines as long as they have downloaded the correct build, installed a license server and logged in it with the email linked to the license.
For example if you have 1 active license you can use it on multiple machines however not simultaneously.
If you have 2 active licenses you will be able to use them on 2 machines at the same time.
You can install the V-Ray license server on any machine you like - workstation, server, laptop or anything else. The server will spread licenses around depending on the number of licenses available.