Update documentation with --listen option usage examples

Co-authored-by: rdementi <25432609+rdementi@users.noreply.github.com>

Author: Copilot

doc/PCM-EXPORTER.md

@@ -20,6 +20,7 @@ Usage: ./pcm-sensor-server [OPTION]
 Valid Options:
     -d                   : Run in the background (Linux/macOS only)
     -p portnumber        : Run on port <portnumber> (default port is 9738)
+    -l|--listen address  : Listen on IP address <address> (default: all interfaces)
     -r|--reset           : Reset programming of the performance counters.
     -D|--debug level     : level = 0: no debug info, > 0 increase verbosity.
     -R|--real-time       : If possible the daemon will run with real time
@@ -28,6 +29,19 @@ Valid Options:
     -h|--help            : This information
 ```
 
+The `-l`/`--listen` option allows you to specify which IP address the server should bind to. This is useful in multi-homed servers, containerized deployments, or restricted monitoring networks:
+
+```bash
+# Bind to localhost only (accessible only from the local machine)
+sudo ./pcm-sensor-server -l 127.0.0.1 -p 9738
+
+# Bind to a specific management network interface
+sudo ./pcm-sensor-server -l 192.168.1.10
+
+# Bind to all interfaces (default behavior)
+sudo ./pcm-sensor-server
+```
+
 ## Windows Support
 
 pcm-sensor-server now runs natively on Windows. Key points: