Resolution:
Yes, it is possible to publish messages using differrent agents with the same subject name but from different Publishing tables. There is no way to use the same subject with the same agent from different publishing tables, because catalog table "ADB_PUBINFO" uses a combination of SUBJECT and AGENT_ID as a primary key.

But it is possible to use different subject names like "ADB.TEST.1", "ADB.TEST.2", etc. from the publishing side and use the subject name "ADB.TEST.>" to subscribe all messages comming from different subject names.