[Samba] samba + user/host authentification

[Hezekiel]

hi, i'm using suse 7.3 with samba 2.2.8 as PDC and openldap for
authentification in network with wfw-, winnt-, w2k-clients. everything works
fine.
because not every client has the same configuration (same progs, same
path's, hardware...), i got problems, if a user dosn't login from his
ordinary workstation, his roaming-profile doesn't work fine.
now, how can i force users only login from special machines (only to
machines which have the same installation).

example: userA only login to ms-workstion1
              userB        login to ms-ws1,ms-ws2
              userC        login to ms-ws3,ms--ws4
              userD only login to ms-ws4

i tried to configure a user restriction about PAM with 'pam_access.so' in
/etc/pam.d/samba and its config file 'access.conf', but it didn't work.
but restrictions for login,ssh, ftp etc. via PAM and 'pam_access.so' works.
maybe i have to set some values for the users in LDAP, but i don't know
what. the answer is probable quit easy, but i've got no more ideas.

any ideas, many thanks.