How to convert a single-user service to a multi-user one?

Question

.NET

There is a Windows service, it is installed on the client's PC, it executes requests that it takes from the server. One service per PC. The service is configured with an ini file.
There was a task to serve 10-30 clients from one PC.
I see this option: make an add-on in the form of a launcher that will start when the service starts, read the config and run the required number of modules. You will also need a tool to monitor the status of running modules and configure them.

There is a feeling that I am reinventing the wheel, maybe there are ready-made tools for such tasks? Or can it be done in some other way?