OK I think XC people agreed finally they did not use the multisig, so please do not claim it, thanks.
There is more than one kind of "multi sig" transaction.
Also I downloaded your client, I see the privacy mode, it uses tor network, this is completely different from multisig, it is apple to orange, lol.
The Tor aspect of XC has nothing to do with the multi sig aspect. XC gives the option to use Tor as an additional feature.
A Multi Sig transaction is one that requires
multiple signatures.
XC therefore uses multi sig.