Help with Microsoft Word (MS Word questions)

Is there a way of securing the document so that it cannot be copied other than by typing it out again word for word.
I was also thinking of something like a watermark on each page to identlfy it's source.

Get a page layout programme. A free, simple on will do. Create large text and/or an image for the "watermark", make it all pale red, and put it on the page as an illustration. Run the text in over this (switch of the default "runaround" for the underlying image/text) in separate columns. Make the whole document a PDF.

MSWord, at least in some versions on the Mac that I know of, will also let you lock documents with a password. Check the options.