You will need to create a template and store the macros in that specific
template. Then attach the template to that document.
See: http://209.68.48.119/word/FAQs/Customization/CreateATemplatePart1.htm
and
http://209.68.48.119/word/FAQs/Customization/CreateATemplatePart2.htm

Did you save the macros in the document or in Normal.dot? Did you save the
toolbars in the document or in Normal.dot? In order to have the macros and
toolbar available only in the specific document, you must specify that
document when creating the macros and the toolbar ("Make toolbar available
to").

You can also, as Tonya says, create a template and store them there, but
they can also be stored with the document. Note, however, that they will
generate a macro warning when the document is opened; this will not be a
problem if you store them in a template.

--
Suzanne S. Barnhill
Microsoft MVP (Word)