No, not in the same way that you can in Excel. If you want to protect a
portion of a document, you can do this by creating a protected form, in
which data can be entered only where there are form fields. For more on
this, see http://word.mvps.org/FAQs/Customization/FillinTheBlanks.htm and
especially the forms tutorials by Dian Chapman that this article links to.
