Try a Global:

sub {
return $ENV{REMOTE_ADDR}
}

Have a column to store this.
Use tags to have the value inserted.
Should work though never tried in LSQL

Go a step ahead with a second global:

sub {
return $ENV{HTTP_X_FORWARDED_FOR}
}

And u could perhaps also store the same (if available), if the Link Owner is using a connection of that sorts.

HyTC