is it possible to do a criteria in a saved search to only list customers who's internal ID matches a certain criteria? like starts with certain letters for example

Actually internal id is a system generated number in net-suite. We do a search in criteria in customer saved search as “ internal id” in filters. In this it doesn’t allows characters like n and m. It only allows numbers. For this we should select ‘ name ‘ in filters. It gives a search whose ids are starting with n or m.