The IPs Unmanaged by Tripwire widget lists those IPs not managed in the Tripwire software. FireMon Lumeta 4.4 pushes metadata about these IPs to the Tripwire where they are made available to users as an asset list.
The IPs listed on the Tripwire- and Lumeta-Managed IPs widget are are receiving the benefits of both Lumeta and Tripwire.
Lumeta cannot "see" the IPs listed on the Unmanaged by Lumeta widget, indicating a lack of visibility into the network on which they are located. Check your Scout deployment.