separate login/password for several services?

hi all,

please, may somebody advice

I need to set separate credentials for each service I provide (optionally) to my users

I think of something like this:

dn: uid=target-user,ou=People,dc=ibs userPassword: ****** ... authorizedService: xmpp authorizedService: smtp authorizedService: pop authorizedService: imap authorizedService: mail ... loginSMTP: mail-send-login passwSMTP: xxx loginPOP3: mail-get-login passwPOP3: yyy ... loginXMPP: login-xmpp passwXMPP: zzz

can I achieve it? from which side to approach the issue?