Yes, you can ask for a multiple-entry Schengen Visa to Poland if you need to travel often between Poland and other Schengen countries. The decision to approve it rests on your travel history, the reason for your visit, and the papers you provide. People applying for the first time usually get single-entry visas. Multiple-entry visas are often given to those who have followed Schengen rules in the past and haven't stayed longer than allowed.