[Samba] Connection scripts with the 'prexec' clause

[Maurice Forte]

Hi all,

I am running Samba 3.0.20B on an AIX server with SECURITY=USER using an 
LDAP backend.    I am looking for a way to capture the actual 
username(%USER_NAME%) that
the client user is logged onto his individual workstation with and compare 
it with the user(%u) they are connecting with the share as.    If they are 
different,  I want to reject the user's connection.   After doing some 
reading,  it appears that a connection script with the 'preexec' clause is 
the way to go but the Samba environment variables only can intrepret 
client's hostname, netbios name, and ip address.   Is there a way for me 
to capture the client's logon id(%USERNAME%) or accomplish this task 
another way?

Thanks in advance,
Maurice Forte