Also this one which was posted over a year ago:
You can pick any third-party multisig wallet you trust (those are just smart-contracts controlling the corresponding funds in Ethereum, after all) -- and after deployment you'll be able to add it into the Parity interface.
THis our approach might or might not change in the future.
And an old blog from 2017, Create a Multi-Signature Ethereum wallet using Parity (just to remind you, this is not official from parity)
Thanks. I also found the link http://johnmathews.eu/ethereum-parity-multisig-wallet.html
and this https://medium.com/tomochain/i-hacked-parity-multisig-wallet-ropsten-network-89241af06fd1