There is a working group within the IETF (Internet Engineering Task Force) that is working on this protocol (https://datatracker.ietf.org/wg/mptcp/documents/). You can subscribe to the mailing list of that group and interact with all researchers around the world (Check: https://www.ietf.org/mailman/listinfo/multipathtcp)

There is also another open community (http://www.multipath-tcp.org/). Cisco products support this protocol too (http://www.cisco.com/c/en/us/support/docs/ip/transmission-control-protocol-tcp/116519-technote-mptcp-00.html)

Hope it helps. Good luck ! 

Imed Romdhani... thanku so much

check this link 

http://www.cisco.com/c/en/us/support/docs/ip/transmission-control-protocol-tcp/116519-technote-mptcp-00.html