No it doesn't and i think i answered you on another French forum ;)
It is not a standard, so there is nothing to support.
"admin" mode doesn't mean anything, it can do some stuff on one portal and other stuff in another portal.
Yes, It's me... tinico on the french forum to !!
Ok, I need this mode... Will Jboss have custom portlet mode in a futur version ??
It won't help you. See the answer on the other forum, in your native language.