That isn't proof of connection but this might be:

Mastica used this address to participate in skyfchain ICO bounty:

Address can be found in this spreadsheet https://docs.google.com/spreadsheets/d/1TtAjwFLQXcWeAJD9I4nY9wMitTGTlYlnYoyjid00Qv4/edit#gid=1834928230
Mastica's signature is archived here http://archive.is/OG93A#selection-7657.0-7657.143

Lesya2015 used this address many times
archived http://archive.is/Y3aaX

...and move topic to Meta.