According to Part 61.51 (f) (2), one is allowed to log SIC time if the regulations under which the flight is being conducted requires his/her presence. IMO that covers augmented crews. What am I missing? As I wrote in another thread:
I think we tend to over-complicate things sometimes. The way I look at it (and no one has ever questioned me during an interview, so I guess it must make some sense) is: Is your name on the release as the PIC? Log the entire flight as PIC. Were you a required crewmember in an augmented crew, but weren't the PIC on the release? Log the entire flight as SIC. Were you part of a 3+ crew in a flight that didn't require more than 2 pilots? Log the time you were on the seat.
What interviewers are looking for is an accurate description of your flight experience, and that pretty much does it in my opinion.