The Word side of that's as simple as using an IF test and inserting the entire page's content into the True or False result, as appropriate. For example:
{IF{MERGEFIELD Condition}= "True" "Conditional text"}

Note: The field brace pairs (i.e. '{ }') for the above example are all created in the document itself, via Ctrl-F9 (Cmd-F9 on a Mac); you can't simply type them or copy & paste them from this message. Nor is it practical to add them via any of the standard Word dialogues. The spaces represented in the field constructions are all required.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]