repulsive classical gravity

Could one make classical gravity repulsive on large scales by this particular change $\mathcal{L}=(\mathrm{\nabla }\mathrm{\Phi }{)}^2/2+4\pi G\rho \mathrm{\Phi }-m^2{\mathrm{\Phi }}^2/2$, giving rise to the modified Poisson equation, $(\mathrm{\Delta }+m^2)\mathrm{\Phi }=4\pi G\rho ,$ and how would that modification differ from introducing a cosmological constant? What would be the interpretation of $m$ in the Lagrange-density?