can linelog log passwords?

[Stefano Zanmarchi]

Hello,
I know that the log section of radiusd.conf allows to log passwords, by
setting auth_badpass and auth_goodpass to "yes" or"no".
But what I need is to log passwords only using the linelog module.
More precisely, I'd like to keep
 auth_badpass = no
 auth_goodpass =yes
 destination = syslog
in the log section of radiusd.conf and occasionally activate password
logging on a local file via linelog for debugging purposes (and not have
password be sent to syslog).
Is this possible?
If not with linelog, is there another way to keep on logging via syslog,
while logging only password to a file?
Thanks in advance,
Stefano