Thanks for the command! While this only helped to stop the service for the current login session, the path to the LaunchDaemon did help me utilize the following commands to remove it permanently [source]
sudo rm -rf /Library/LaunchDaemons/com.codicesoftware.plasticscm.server
sudo launchctl remove "com.codicesoftware.plasticscm.server"
I'm leaving this here for anyone else interested in disabling the local server.