Thanks for all the suggestions friends!!! Here's what seems to work for me.

if ( $IS_NT ) {
    require "Win32/AuthenticateUser.pm";
    import Win32::AuthenticateUser AuthenticateUser;
    require "Win32/NetAdmin.pm";
    import Win32::NetAdmin GroupGetMembers;
}

if (&check_passwd_nt($user_text,$passwd_text) && 
    &check_group_nt($user_text,"supercam")) {
    print "user IS a member of supercam\n";
} else {
    print "NOT a member of supercam or typed wrong password\n";

}

sub check_passwd_nt {
    my ($uname,$guess) = @_;
    return(AuthenticateUser("ANAHEIM",$uname,$guess));
}

sub check_group_nt {
    my ($uname,$group) = @_;
    my @users = ();
    GroupGetMembers("ah_nt1",$group,\@users);
    return(grep { lc($_) eq lc($uname) } @users);
}
[download]

Thanks again for giving me some stuff to try.

Prost,
Moe