I was not able to find exactly how to do this on any forums/posts or even the SolarWindows Thwack. Through some trial and error and some troubleshooting with Solarwinds - we now can import these.

Steps.

1. Edit the Flow Designer Action - ( or create your own)
2. Under the Script Step - under Nodes Select statement add your custom properties seperated by a comma using Nodes.CustomProperties.CustomPropertyName
3. 1. Example Nodes.CustomProperties.Loc_Street_Address , Nodes.CustomProperties.ISP_Account_Number
4. That is it! It will import the data!