Plumber's putty is used between the drain and the tub. Teflon tape is used for pressure tapered threaded connections. Pipe dope can be used for those threaded connections as well in place of or in addition to the teflon tape.
So, depends on what exactly you are connecting on the tub - the drain to the tub would likely get putty. Most of the other drain connections are likely either glued, or compression fittings and they don't need any additional compounds.
What are you doing?