your sponsor can ban you for lifetime,5 years and minimum 2 years .this 2 year ban is by govt.it is common for anybody who cancel rp and went out.more than 2 yrs ban your sponsor have to show solid reason to mini of interior and it is very hard for employers.
now if you want to return before 2 years,noc is requried from old sponsor.if you carry noc with you at time of dept,it need to be endorsed by immigration and this endorsement will expire automaticaly after 6 months.in that case your new employer have to get another one to get your new visa.
but wait,,,,,,,which visa are you?some type of visa does not need 2 years bar.