CA is no different from any other finish. It is ready for the next coat when the previous coat comes off as a dry white powder on 0000-steel wool. It is easier to smooth the surface after each coat than to wait until there are several coats.
Remember that subsequent coats of CA do not melt into the finish under it. The steel wool between ciats will leave a surface that the nextcan bond to much better than on top of a gloss.