Repeater mode E220

Hello Renzo. I would like to build a repeater with the E220 module that monitors all messages in a communication channel and uses a table to decide whether it should repeat the message again or not. E.g. if 1 wants to send to 4 it will be repeated. if 1 sends to 2 then no. The reason is that I want to define where it is necessary to repeat the message. But I'm still having trouble understanding how the repeater mode works. Is there any good documentation on this? Thanks and regards.