I found in war-deployers-jboss-beans.xml this rem:
You can configure a set of authenticators keyed by http-auth method used. This will apply the same set of authenticators across all web applications. You can override the set of authenticators at the web application level by adding
element to the respective jboss-web.xml
Is it possible to define custom authenticators in AS 5.0.0GA in my application war ?