There is no option in Word 2010 that allows you to use a different header and footer for different sections in a document. The trick is to use section breaks and unlink the header and footer respectively–this allows you to set them as you are creating the document.
For demonstration purposes we have a document with a plain text header as well as a plain text footer which both say How-To Geek.
This is awesome but i want a different header and footer on the next page saying my name. Now we could use the option which allows for different headers and footers on odd and even pages, however we also want a different header on the third page saying @howtogeek (which is our twitter handle). The only way to achieve this is to use section breaks. So place your cursor at the end of the first page and switch to the page layout tab.
Now click on the breaks button in the Page Setup section and choose to insert a New Page Section break, choose the next page section break
Click on the Header on the second page and click on the Link to Previous button to unlink it
Once it has been unlinked you can edit it without effecting your other header
You will need to do the same for your new footer as it will still be linked to the footer in the previous section
Now you can make your changes to the footer
You can create another section break and use another header and footer if you so choose to give your third page a completely unique section break