You can do footers by section, but that requires telling Word what
constitutes a section, that is, inserting a section break between each
section.
Also note that clicking on View | Headers/Footers gives you far more control
than using the Insert | Page Number command. If you have already inserted
the section breaks, you will see "Header - Section 4" etc labeling the
headers and footers. Use File | Page Setup, Layout to set Different First
Page for all sections, then simply type what you want into the First Page
Footer and the Section 1 - Footer. Repeat for each section.
If the section name reflects a title in the main text, look up StyleRef
field in Help to simplify your life. Otherwise, you will have to use the
icons on the Header/Footer toolbar to unlink each footer from the previous
section in order to type independent text.
DM