I checked my Windows Firewall settings and saw that I, too, have multiple ARCHICAD 19 entries.
Your program lists each Private/Public permission in a separate row so two rows can belong to the same application. Mine, which is the default Windows Control Panel, lists both in the same row.
You can check the details for each row. When I did I found many of the items were for AC19 beta versions, which remained in the system.
If you have the same situation, you can delete all those items belonging to beta versions.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac27