You may find information on Capture connectivity with MA on the link below
https://www.capture.se/Support/Connectivity
Unfortunately, you cannot receive DMX from grandMA2 onPC unless you have MA hardware connected. Some competing lighting design and visualization software on the market support receiving DMX as well as DMX feedback ("autofocus") over MA-Net without the need for MA Lighting hardware. This is possible for historical reasons as they were provided with other drivers than us prior to an MA Lighting policy change. For further information and/or clarifications on this matter, please contact MA Lighting.