AIX truss may accept some option to make it also dump syscall arguments (as those passed to bind). Otherwise a debugger could be used to inspect them, but this is quite more difficult.

Calling SSH with the verbose flag may also give some useful information: 

$ssh=Net::OpenSSH->new($host, master_opts => '-vvv',...)

[download]
Finally, witch version of OpenSSH are you using?

In reply to Re^5: Net::OpenSSH connection failing with 'muxserver_listen bind(): Not owner' by salva
in thread Net::OpenSSH connection failing with 'muxserver_listen bind(): Not owner' by Only1KW

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