I would like this feature, which appears to be only a Windows Remote Desktop Manager feature, added for the Mac.
I recently noticed you have a jumphost feature, but it only supports Windows for both the client AND the jumphost it seems. I have a Mac that I use as my client but would be using a jumphost that is Windows and destinations that are also Windows.
I got a trial of the Enterprise edition but couldn't get the Mac side options to show up. If there is a beta available I'd be happy to test it out!
I've inquired about this with the Windows team and we don't think it is possible. It requires features available through the Microsoft RDP ActiveX which are not available via FreeRDP (which is the engine with use in RDM Mac).