Oh this is bad...
I checked those server logs and they give nothing like what I need.
There must be others out there (on this list) that need to print logs
showing who logged in and for how long etc. Is there no OSX client
solution?
You can use 'last' to see who logged in, from where, and how long.
There is the beginnings of the solaris auditing system on Mac OS X, but
Apple hasn't finished it yet.