Hello,
No, currently, Orthanc does not act as a DICOM MPPS (Modality Performed Procedure Step) SCP.
At the moment, Orthanc supports Echo SCP+SCU, Store SCP+SCU, Find SCP+SCU, and Move SCP. Work on Move SCU will take place in the following weeks, and will be part of release 1.0.0.
Support of DICOM Worklists and DICOM MPPS is not planned so far, but you can of course propose and vote for such features in future releases:
HTH,
Sébastien-