The easiest way to achieve your request would be to use the variables in the master "DaliCore".
Get the Kiosc sending triggers to the master DaliCore.
Control one variable with those triggers.
Example use Variable 1, variable 1 goes to 1 when requesting scene 1 etc.
Create a variable action list and action that will trigger scene 1 when variable 1=1
add to this action an OSC message sent to the slaves DaliCores.
This way all your DaliCores will do the same and you can use a refresh of the variable to know what scene was requested last.
plan B, (not using a master/slave setup) would be to have your KIOSC sending messages directly to all DaliCores.
I hope this will help you,