conditional bcc - is it possible

[pf at alt-ctrl-del.org]

After all tests have been passed and Postfix decides to accept an email, I'd like to selectively BCC some email for 
later (manual) inspection. But I don't want to "hold" that mail.

BCC isn't available in Access, stable.
Can always_bcc, recipient_bcc_maps or, sender_bcc_maps be called\applied\set 
from an access_map?

Like:
smtpd_data_restrictions = check_client_access regexp:/etc/postfix/suspect.regexp
...
/static/ do_bcc_here