Answer:
The form-finding result can be exported in a DXF file.
There are several options for this.
For example, you can use "Direct Export" to a DXF file.
Please note that AutoCAD must run as an application in the background.
Another way is to use the Export feature in the File menu.
It is important to export the 3D-Face elements.
Unfortunately, there is no direct interface to Autodesk Revit at this moment.
However, the webinar about tensile membrane structures shows a possible workflow for integrating the export into a Revit model. To do this, click the following link.