$ perl -Mstrict -Mwarnings -e '
> open my $usersFH, q{<}, \ <<EOD or die open qq{open: < HEREDOC: $!\n};
> dn: uid=donald,nameSpace=mydomain.com,ou=users,o=sp
> radiusFramedAddress: 192.168.0.2
> 
> dn: uid=mario,nameSpace=mydomain.com,ou=users,o=sp
> radiusFramedAddress: 192.168.0.7
> 
> dn: uid=thijs,nameSpace=mydomain.com,ou=users,o=sp
> radiusFramedAddress: 192.168.11.15
> EOD
> 
> while ( <$usersFH> )
> {
>     if ( m{^radiusFramedAddress:} )
>     {
>         print
>            qq{changeType: modify\nreplace: radiusFramedAddress\n};
>         s{$}{/32};
>     }
>     print;
> }'
dn: uid=donald,nameSpace=mydomain.com,ou=users,o=sp
changeType: modify
replace: radiusFramedAddress
radiusFramedAddress: 192.168.0.2/32

dn: uid=mario,nameSpace=mydomain.com,ou=users,o=sp
changeType: modify
replace: radiusFramedAddress
radiusFramedAddress: 192.168.0.7/32

dn: uid=thijs,nameSpace=mydomain.com,ou=users,o=sp
changeType: modify
replace: radiusFramedAddress
radiusFramedAddress: 192.168.11.15/32
$