  Using the coset approach (nonlinear realization) we construct component
actions for a superparticle in three-dimensional spacetime with N=4
supersymmetry partially broken to N=2. These actions may contain an anyonic
term and the square of the first extrinsic worldline curvature. We present the
supercharges for the unbroken and broken supersymmetries as well as the
Hamiltonian for the supersymmetric anyon. In terms of the nonlinear realization
superfields, the superspace actions take a simple form in all cases.
