Is there a way to setup zenoss to monitor individual CloudStack Accounts? I want to be able to monitor customer VMs and have a tab in their console that will show Zenoss and only show inforation about their servers.
Not in the current version of the CloudStack ZenPack. It's totally from the provider perspective. It requires global admin privileges, and what it gets goes along those lines.
You can enter an issue to request this kind of feature over at https://github.com/zenoss/ZenPacks.zenoss.CloudStack/issues.