Hi,
Can you please elaborate more, what L2 and L3 technologies are you asking about. If you are asking about VPN types that can be delivered over MPLS, then yes it can be delivered in both flavors; layer 3 (L3 MPLS VPN) providing a peer-to-peer VPN model and layer 2 (AToM and VPLS) providing emulated overlay model (AToM can provide EoMPLS, FRoMPLS ...).
I hope that i've been informative, and please don't hesitate to elaborate more.
BR,
Mohammed Mahmoud.