No. You can publish as many computers on Network as you want. Computers published on Network are not tied to a User Id. You don't even need a User Id/NoMachine Account to add any computer to NoMachine Network. Simply go to Settings > Network > Machine on the computer you want to connect to and click 'Add'. By adding the computer on Network, it is given a Machine Id and Access Id and you, or the person who needs remote access, use these to connect using a NoMachine Network connection.