absolutely.
even when you are using same developer, same dilution, same timing, how do you agitate the tank will affect the contrast.
actually, exposing your negative and developing your negative is one packet, can't really separate them
as boss nikkornos mentioned in this thread:
http://www.clubsnap.com/forums/traditional-darkroom/1074940-process-flow-b-w-zone-system.html#post7838446
if the contrast during shooting is too big, you should shorten the development time (or less agitation)
if the contrast during shooting is too plain, you should lengthen the development time (or agitate more)
but since you don't have control on developing process, you should adjust the contrast during exposure, which in this case using contrast filter
