How can i add Domain name as a part of my Serilog file

The start up code is like below on Startup.cs file

// This method gets called by the runtime. Use this method to add services to the container.
 public void ConfigureServices(IServiceCollection services)
{
  SerilogConfig.Configure(services, Configuration);
    ....................
    --------------
}

And the code of SerilogConfig is like

  public class SerilogConfig
  {
      public static LoggingLevelSwitch? MyLoggingLevelSwitch { get; set; }
      
      public static void Configure(IServiceCollection serviceCollection, IConfiguration configuration)
      {
          var baseLogPath = configuration["SeriLog:LogPath"];
          if (string.IsNullOrEmpty(baseLogPath))
          {
              throw new Exception("SeriLog:LogPath is not set in the app.settings.");
          }

          var logLevel = configuration["SeriLog:LogLevel"];
          if (string.IsNullOrEmpty(logLevel))
          {
              throw new Exception("SeriLog:LogLevel is not set in the app.settings.");
          }

          var deploymentMode = configuration["DeploymentMode"];
          if (string.IsNullOrEmpty(deploymentMode))
          {
              throw new Exception("DeploymentMode is not set in the app.settings.");
          }

          var appName = configuration["ApplicationName"];
          if (string.IsNullOrEmpty(appName))
          {
              throw new Exception("ApplicationName is not set in the app.settings.");
          }

          var rollbarAccessToken = configuration["RollbarAccessToken"];
          if (string.IsNullOrWhiteSpace(rollbarAccessToken))
          {
              throw new Exception("RollbarAccessToken is not set in the web.config.");
          }

          var appLogName = $"{appName}-{deploymentMode.ToLower()}";
          var detailedLogFile = baseLogPath + "\" + appLogName + $"-{DateTime.Now:yyyy-MM-dd}.log";

          var outputTemplate = "{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level}] <" + deploymentMode + "|{SourceContext}|{CorrelationId}> {Message}{NewLine}{NewLine}{Exception}{NewLine}";
          
          -----------------
          --------------------
          ------------------------
          
      }
  }

I can add the domain name / application name as a part of appsettings.json file, but in my case the website is hosted on IIS in a different way

There are 2 different websites exists in IIS , both of them pointing to the same directory / same appsettings.json file . Only the domain mapping is different.

So sites www.site1.com and www.site2.com is pointing to the same folder in IIS

So is there any way I can add the domain name / part of the domain name [ site1 / site2 ] to my Serilog log file