[Samba] Samba different workstation domains's

[Wolfgang Paul Rauchholz]

I am setting up a linux home server.
I want to create a shared folder for all and a private folder for each user.
I setup samba and I can connect to my shared. Question:
How do I need to setup samba that other user whose laptops/desktops have
different workstation domains can connect to that samba instance? I
understand that I can only define 1 workgroup in smb.conf?

Thanks for your help.