From the openSPOT2 online manual:
https://manuals.sharkrf.com/openspot2/en/srfipconn-server-connector.html
"This connector only supports 1 active connection, so if you want to link more than 1 device, you can use our open source SharkRF IP Connector Protocol Server. The protocol's documentation can be found on GitHub, so you can also develop your own application for the openSPOT2."
The Protocol Server is open source so you can create a server that will accept more than 1 connection.