URL iview with <user.id> as part of the URL address

Dear all,

I want to create an URL iview in order to display a KMfile, which its access link depends on <user.id>.

e.g

http://PORTAL_PATH/com.sap.km.cm.docs/<b><user.id>/</b>File.pdf

Any hint or idea, is more than welcome

Many thanks

Vasso