Can you understand this man page entry?

[Ole Tange]

Do you understand this (especially the last section)?

       --workdir mydir
       --wd mydir
                Files transferred using --transfer and --return will be
                relative to mydir on remote computers, and the command
                will be executed in that dir.

                The special workdir ... will create a workdir in
                ~/.parallel/tmp/ on the remote computers and will be
                removed if using --cleanup.

                The special workdir . will use the current working dir.
                If the dir is a subdir of your home dir, the dir will be
                converted to a relative path, so if your login on the
                remote system is different, GNU parallel will still do
                the right thing.

I am not too fond of the last sentence. Help me re-write it.

/Ole