This were taken from a similar problem in a forum...
If you are using Word 2007, you can lock or protect parts or sections of the document using the Protect Document > Restrict Formatting and Editing command. Here is the detailed explanation on using this features
http://office.microsoft.com/en-us/word/HP100823011033.aspxFor earlier versions, you need to use the Form feature as explained below:
http://www.officearticles.com/word/protecting_parts_of_a_document_in_microsoft_word.htmAlternatively if your document is a simple text document, you can use excel as word processor (after hiding the grid) which will give you full control on protecting single words, single lines or entire paragraphs.
Hope this helps.
