You should be able to configure WCF Security Auditing, to log security events to the Windows event log, by specifying the following in the configuration file:
Service Behavior definition: (e.g.)
<behaviors>
<behavior name="myAuditBehavior">
<serviceSecurityAudit auditLogLocation="Application"
suppressAuditFailure="false"
serviceAuthorizationAuditLevel="None"
messageAuthenticationAuditLevel="SuccessOrFailure" />
</behavior>
</behaviors>
Service Behavior referenced in the service definition:
<services>
<service behaviorConfiguration=" myAuditBehavior" ...
<endpoint
Reference: http://msdn.microsoft.com/en-us/library/ms734737(v=vs.110).aspx
Note: you do not show the service section of your configuration section, so you need to make sure the service is using correct behavior.
Regards,