Like I said in the CB: read the file in paragraph mode and extract the sections with /^PATTERN/m. Example code: 
#! perl -w

$/ = "";  # paragraph mode
while(<DATA>) {
    if(/^dn:/) {  # skip irrelevant paragraphs
        my($cn) = /^cn:\s*(.*)/m;
        my($gid) = /^gidNumber:\s*(\d+)/m;
        my(@member) = /^memberUid:\s*(.+)/mg;
        print "cn: $cn\ngid: $gid\nmembers: @member\n\n";
    }
}

__DATA__
*** Your sample data follows ***

[download]
The printout I get is: 
cn: groupname1
gid: 122
members: member1 member2 member3 member4 member6 member7

cn: groupname2
gid: 113
members: member1 member2 member3 member4 member6 member7

[download]

In reply to Re: rexexp across a ldap ldif file, collecting cn: guid: memberUID: by bart
in thread rexexp across a ldap ldif file, collecting cn: guid: memberUID: by khippy

Title:
Use:  <p> text here (a paragraph) </p>
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