You can block Poser with your firewall, it does not need to have access to the internet. * Poser also updates the web links found in the Help menu. That would explain why my copy of Poser 4 has the DAZ Platinum club listed among other sites that didn't exist a few years ago.* Daz does not update the weblinks via Internet, they are included in the exe files when you install a new DAZ item. If you install DAZ items to a temp folder instead into Poser you could see that it creates a folder called Weblinks that contain links to DAZ website.

Every organisation rests upon a mountain of secrets ~ Julian Assange