Lurin ambushed the Enterprise-D at Ligos VII and forced its crew to work in the dangerous mines on the planet where several of them were injured. He then held the civilian personnel of the Enterprise-D hostage under threat of execution as leverage against CommanderRiker, who was in command of the vessel at the time.
In the writer's first draft of the script for "Rascals" (which had the working title "Maker of Dreams"), the Ferengi leader was a DaiMon called "Kosago". He was friendly with Riker, and since that script was significantly different, he had a much different strategy than Lurin.
According to the script for "Bar Association", his name was pronounced as "LOOR-in".