user.domain.tld accounts and user domain.tld

[Achmed]

I hope i understand what you want.
I changed at my /etc/ispcp/apache/parts/dmn_entry.tpl:

Code:

ServerAlias     www.{DMN_NAME} {DMN_NAME} *.{DMN_NAME}
to
ServerAlias     www.{DMN_NAME} {SUEXEC_USER}.example.com {DMN_NAME} *.{DMN_NAME}

Where example.com is my main-domain.
No every user i add gets a server-alias like vu2xxx.example.com.
You can add your sub1 and sub2 to this line: sub1.{DMN_NAME}.
But this will add these subdomains to every new user you add.