Can I log simulated instrument time in a simulator as a CFII?
A Level C or D Full Flight Simulator (FFS) can be used for all training required for an initial type rating, a 61.58 check, an IPC, landings required to maintain landing and instrument currency. In fact, so long as it is not (in most cases) your first type rating, you can fly a Level C or D sim, get certified and then walk out to the airplane, load it up with PAX and go flying, legally while having ZERO actual flight time in the actual aircraft.

So I would say yes you can log Dual given in a flight simulator, but you cannot log that time as flight time.