Hi Steven,
Thank you for reaching out to Adobe Community.
At the moment the Exclude by IP works per Report Suite basis. Which means you need to exclude IPs for every Report Suite separately .
Though there is an alternative called Vista rules but that's more advanced and you need to talk to your Account Manager to know more on that. Plus there is a cost involved as well.
To know more please go through the doc mentioned below:
http://microsite.omniture.com/t2/help/en_US/reference/VISTA.html
Thanks!