Logging of user using UMFactory API

HI experts ,

i have a Requirement , like in sap EP we can use

UMFactory.getLogonAuthenticator().logout(httpRequest,httpResponse); 

this code to logoff the user , now in the webdynpro how to logoff in the above way , like im using

WDClientUser.forceLogoffClientUser(https://host:50001/irj/portal);

in one of my webdynpro application say WelcomePage to logoff the user based on some conditions.

using UMFactory.getLogonAuthenticator() at the portal component..... we can logoff the user for all webdynpro applications .

but WDClientUser.force....... will logoff the webdynpro application alone where it was used.

Regards

Govardan Raj S