  We study perturbative unitarity constraints on generic interactions between
fermion and vector fields, which are allowed to have generic quantum numbers
under a $\prod_i SU(N_i) \otimes U(1)$ group. We derive compact expressions for
the bounds on the couplings for the cases where the fields transform under the
trivial, fundamental or adjoint representation of the various, considering both
the case of a complex vector arbitrary interactions with fermionic current and
also the case of vectors arising as gauge fields. We apply our results to some
specific NP models showing the constraints that can be derived using the tool
of perturbative unitarity.
