Can you run multiple WM farms in a domain?

I am in the process of testing WM 1.0 with SharePoint 2013 RTM.  We have dev/staging/production SP farms in our domain.  I'd like to setup different workflow farms to support each of those environment.  I'm starting to see a problem (cannot register SP site to the 2nd farm) when trying to setup the 2nd WM farm.  Before trying to debug, I want to make sure this topology is supported.  I can't find any definite answer in the online docs.

Does anyone know if running 2 Workflow Manaer farms (not clustered) is supported?

Thanks,