According to USCIS rules you are only allowed to work off campus after one academic year of study(9 months) and in a field related to your area of study.
Exception exists for graduate students whose programs require immediate curricular training. But honestly I haven't come across programs that fall under such category. The International student offices in general are very strict about CPT before 9 months, hence I think its extermely unlikely for you to find a Masters programs that lets you work before 9 months. Good Luck