I've submitted this for you as a feature request/discussion item as Matt is likely tied up with other tasks, and this should help keep it on the radar in the future. In the meantime, physically binding the IP address to the server should allow for your IDS system to function properly. If you're unable to bind the IP directly to the server, I recommend implementing a network level IDS system that can scan traffic during ingress so that the IDS system in SM is not necessary.
Kyle Kerst
System/Network Administrator
SmarterTools Inc.
(877) 357-6278
www.smartertools.com