Windows 7 - Samba Shares - multiple credentials

Following the answers here Samba+Windows: Allow multiple connections by different users?, I figured there is no solution from the windows client.

So I added several aliases to my linux server: /etc/samba/smb.conf

[global]
    unix extensions = no
    netbios aliases = ALIAS1 ALIAS2 ALIAS3
    wide links = yes
    workgroup = WORKGROUP
    os level = 20
    follow symlinks = yes
    wins support = true

then I connected to each alias with a differenet user & password.