Are you on cloud or premise? Either could be set up with an outbound API to send the logs. Alternatively, if you are on premise the Logging engine could be turned off and you could have the third party utility pick up that logs directly from the flat files in the logging path you've defined. This would mean however those logs would never be placed into the ISM Logs workspace.
I'm sure there are other ways also, those are just a couple I can think of off the top of my head.