From Live Linx:
Conditional Text for Word is a Word Plug-In that empowers users authoring capabilities by providing the ability to manage and control document variations and versions, within one Microsoft Word document. Create custom tags that define product variations or versions, different document audiences, or any other condition you may need. Mark any part of the document according to the pre-defined tags. Filter the document according to each tag, or any combination of tags, to get customized and user-targeted content.