Can multiple OracleIDs be used to access datatase in a single HTMLDB app?

Hi,
In one of the apps we're looking to put together (w/ HTMLDB), we currently control database access using Fine-Grained-Access (with policies on tables that generate WHERE predicates based on the Oracle UserID in the session context). The way we currently have HTMLDB set up, it seems to be using a single "proxy" ID (HTMLDB_PROXY_USER) as the means of accessing the database, which means FGAC can't work.
Can this be configured to use other UserIDs when accessing/querying the db?
And...if so, can those IDs be specified somehow, either programmatically or at login time?
Thanks,
Jim Carter

Helps some more...tks...
So - is it safe to assume that the "v()" function is an element of HTMLDB that is installed and made public when HTMLDB is installed then?
Reason I ask is because we are thinking we could modify our existing predicate logic to check for the existence of the APP_USER value, and if it exists, use that instead of the SYS_CONTEXT() call, in our predicate generation function. However, seems like we'll also need some check as to whether the "v" function exists (ie. whether HTMLDB is installed), since the policy might be running in an environment where the HTMLDB app wasn't installed. But to even be able to compile Or, even where HTMLDB was installed, the query could be coming from a connection outside of the HTMLDB app. Does that sound reasonable?
Further, whether we use the existing SESSION_USER context var or the APP_USER one is really no big deal. The bigger question seems to come from mgmt of the user accounts used to access the application. Ideally, we want to be able to support access to the tables, either from the HTMLDB app or from external points (SQL*plus, Discoverer, etc). So the least common denominator seems to be Oracle (database level) UserIDs. However, can an HTMLDB app authenticate
using actual Oracle database UserIDs? That is, delegate the authorization to the database itself? And if it does, will the UserID be available via the APP_USER var, or some other...?
Tks,
Jim
BTW - If your willingness to help is any indication of the support on this board, that could well be the final selling point in deciding to use this technology - in other words, thanks a lot!

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