Often times, within a workflow, changes need to be made to item properties. If there were a way for Nintex to recognize changes made by Nintex (system), that could make conditional start options much easier for other workflows on the same list/library. In other words, a wf update to a field won't trigger a change that starts another workflow. Being able to add conditional starts that EXCLUDE changes made by Nintex, versus a human, would be very, very helpful.