Different machines and controllers from same PC

Seems there is mixed answers.
-Grumpy_Old_Man saying it cant communicate with more than one at the same time.
-Patric confirming this and also saying he has 2 lasers and not able to communicate at the same time
-Oz saying you can communicate at the same time as long as 2 instances of lightburn are open.
-Also Oz on another thread here Multiple lasers - 1 computer working at same time - possible? (last post) says it can only communicate with one machine at the same time even though 2 instances are open

Thanks for the quick answers so far, hope to get a definitive answer.