Mapping - unbounded to different targets

People,

I have this scenario :

Note that, in source, I have an unbounded structure.

At the target, I have two 1..1 structures.

If the id field in the source structure, is with the value "1", I must map to the structure "emit". If the value is "2", I map to the "dest" structure.

I tried several ways, but the target structures are 1..1 and therefore it only maps the first occurrence of origin.

Is how to do this?

Thank you