Multiple similar sources to single destination?

I'm on Oracle 10.2.0.3 and am looking to replicate table changes being captured in multiple sources into a single destination. Let's say LCRs from source databases A and B are propagated into destination database C. In the destination, the LCRs from A and B will go into separate queues and be processed by different apply processes.
This is all good. However, is there an example or "best practice" of doing this if sources A and B are separate occurances of the same application? For example, the schema FU exists with table BAR in source A and in source B, and the BAR tables contain different data.
Obviously, you can't create two FU schemas in the destination. Also, I can't replicate both source BAR tables into a single BAR table in the destination, as it would violate primary/unique keys required by Streams (not to mention double the size of the destination BAR.)
Thanks for any ideas, and I hope I've explained this clearly enough to get a response.

I'm sorry I posted a cross-posted a question regarding Streams Replication to the "Streams" and "Replication" forums.
I thought the question was on-topic for both forums, and users who saw both postings could just ignore one of them.
I didn't see any info about cross-posting in the [forums etiquette|http://forums.oracle.com/forums/ann.jspa?annID=885] , [forums FAQ|http://wiki.oracle.com/page/Oracle+Discussion+Forums+FAQ] , or [terms of use|http://www.oracle.com/html/terms.html] .
Moderators feel free to remove this post if I missed something and it is in violation.

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