Anyway to find output ports on a clock in tcl?

Is there a reason you're not explicitly listing the ports?

set ssync_ports [get_ports {ssync_d[*] ssync_parity ssync_addr[*]}]

set_output_delay $OMD -max -clock [get_clocks {AD2CK}] $ssync_ports

FYI, I posted a source-synchronous document with examples, in case you're interested:

http://www.alterawiki.com/wiki/source_synchronous_analysis_with_timequest

Nothing wrong with the one you're looking at, so if you like it then it may be more confusing to look at something else.

What's your clock rate? A 10ns output delay seems pretty high for source-synchronous interface(that usually means it's a slow interface, and slow interfaces don't often do source-synchronous, but it does happen now and then).