You can save a PowerPoint presentation as a PDF to lock its content and formatting in place, so that other people can view the file but can't make changes. Converting a PowerPoint deck into a PDF ...

If individuals want to control access to their presentation and do not want anyone else to retrieve it, the simplest solution is to assign passwords. To open a presentation with an assigned password, ...

Going to PDF with one of the the full versions of Acrobat may be able to get you closer to what you want, but even with that I think you're expecting too much from what you'll be able to control with ...