Is it possible to have the same WordPress theme and content in a Multi-site?

I wish to setup a site that when visitors are from Australia or New Zealand, they are redirected from the .com (main site) to .com.au or .co.nz. Is this possible to setup with a WordPress Multi-site using the same theme and that when the content is updated on the main site (.com) the rest of the sites (.com.au or .co.nz) are also updated? I do know how to redirect visitors based from their IP.