It is a standard feature of app_rpt. You will need to follow the first link to create a telemetry section for your specific nodes, then specify in each node stanza what telemetry section they will use (discussed in bottom link).
This is a global option though for nodes. if you have 3 nodes on one server, then you can do three different global CT tones.
You cannot do a custom specific node only tones if node XXX connects to you in this manner.
That would be akin to having ringtones for each caller on your cell. It isn’t supported in the GPL version of app_rpt.