Based on the research I had, the state will not do anything to stop you go to other states under 190 as of now. Some say there will be a change in the future, even though the rumor has been going on for years.
I am going to get NSW 190, and planning to move to Melb right after the grant. For NSW, they will send out a non-compulsory email survey after 1 year of the grant. Other than that, nothing else has been implemented to check the person's real location.
The commitment for 190 is mere of a moral one.