Most recruiters or HR professionals involved in hiring for a company will have access to all applicant information across open positions. If you apply to multiple positions, you risk the perception that you are unclear about the type of work you are best suited for, or are most interested in. I suggest determining the position within a company that is the best fit and applying for that one. A more focused approach to your job search is usually the best for both minimizing your time spent, and improving potential outcomes.