From the JN Perfect Golf presentation page:
"Nicklaus Design Course Forge is our Golf Course design software and is used in house by Nicklaus Design for all their golf course designs. You will get to use the same tools that one of the most award winning designers of all time uses. While it will not available at release, pending the conclusion of negotiations with vegetation content developers it will be released very soon. Already there are many user course creations that have been created by the community for the community. Community developed content can be played in Perfect Golf so long as you keep your game updated to the latest version."