  We calculate the dependence of the interlayer quasiparticle conductivity,
$\sigma_q$, in a Josephson coupled d-wave superconductor on the magnetic field
B||c and the temperature T. We consider a clean superconductor with resonant
impurity scattering and a dominant coherent interlayer tunneling. When pancake
vortices in adjacent layers are weakly correlated at low T the conductivity
increases sharply with B before reaching an extended region of slow linear
growth, while at high T it initially decreases and then reaches the same linear
regime. For correlated pancakes $\sigma_q$ increases much more strongly with
the applied field.
