Have a look at the Client preferences: start the IDE and choose Options/Client options…, then select tab Netconfig/Netmonitor. Here you can change (a bit) how the Network monitor looks, per client.
Or do you mean something else?
Zuyderland Medisch Centrum; Heerlen/Sittard; The Netherlands
In our case the server is AIX so to run the netmonitor requires us to launch a TCL/TK GUI via hciaccess and yes it does look different than on a windows client running the JAVA IDE.
I don’t know if this is similar to your case but thought I would share.
Another thought is are both versions on the server and the client the same.
To check this go into IDE -> help -> Support -> click client and server tab and confirm the versions are identical down to the revision level for the site in question.