How can I specify local RunAsAccount when creating SB Farm as logged on user?

My computer is on a domain, I am logged into the domain.

I want to create a SB Farm on my computer and use a local user account for the WSB services.  This appears to be a supported scenario - "The Service Bus for Windows Server supports the ability to have the RunAs account user as a domain user or a local user" (http://msdn.microsoft.com/en-us/library/windowsazure/jj193011(v=azure.10).aspx).

When I try to create the farm I get the following message:

10/01/2013 2:18:46 p.m.: An Error Occurred:
New-SBFarm : Cannot validate argument on parameter 'RunAsAccount'. Local RunAs user is not supported when you have logged in as a domain user.
At redacted.ps1:54 char:19
+     -RunAsAccount $LocalUserServiceAccount `
+                   ~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidData: (:) [New-SBFarm], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationError,Microsoft.ServiceBus.Commands.NewSBFarm

As per the question title, please advise if this is possible.

Thanks,

justin