  We demonstrate existence of non-pairwise interaction forces between vortices
in multicomponent and layered superconducting systems. That is, in contrast to
most common models, the interactions in a group of such vortices is not a
universal superposition of Coulomb or Yukawa forces. Next we consider the
properties of vortex clusters in Semi-Meissner state of type-1.5 two-component
superconductors. We show that under certain condition non-pairwise forces can
contribute to formation of very complex vortex states in type-1.5 regimes.
