After you create your project in BIAB you can drag the individual parts to a "drop" box that appears in the
upper left of BIAB main screen . It is converted to aiff in less than a minute. If Logic is open, create a track,
then drag the aiff part from the drop box to a track in that program.
If I correctly understand your question, the answer is that it is not difficult at all to do what you want.
I opened both programs, converted a track, transferred it to Logic in a matter of just a few minutes.
I do believe that each BIAB track has to be converted and "dropped" separately.
And hey it was all done at almost the midnight hour
Good luck