Can I use NEM to secure a security deposit with neutral third party?

I see there is the opportunity to reduce the risk to renters by making it harder for a landlord to keep the security deposit unjustly by having a smart contract hold the funds and it is released to either party by having at least two signatures to approve transaction. The neutral party is involved in case of dispute about who gets the funds.

NEM focus on improved non energywasting blockgeneration
combined with a zero inflation system
fast transaction times
high transaction throughput (will increase a lot once catapult codeupgrade released)
reliable network nodes (eigentrust+ node reputaion system)
and a powerfull backbone for mobile wallet mass adoption via the supernodes (soon 500 of them existing)

improved multisig functionality

improved asset mechanics (namespaces+assets)

BUT there is zero included decentral “smart contract” logic
(thank god u have to say if u look at TheDAO)

so for ur usecase u can use multisigs and human mediators
one or more of them

similar to how https://bitsquare.io/faq/ manage “dispute resolution”

in fact rebuild the whole bitsquare business idea of a decentral excahnge could be done better on NEM chain then on bitcoin chain

because we have definatly the more powerful multisig support

business idea free to grap for anyone here
create a better and cheaper bitsquare based on NEM chain

back to the question why no smartcontracts is good
because no smart contract can beat human dispute mediation
and once AI mediator avaiable to handle that stuff
even then u can use the plan multisig blockchainbased part that NEM already have
and set on top a mediation service

at least this way we can make sure never ever customer written code can make our blockchain fork
as it happend with ethereum

As cryptonit said NEM’s multisig is a more than powerful enough for your use case.

It is an on-chain contract, not a smart contract. The beauty of that is you can use a feature that has been tested time and time again and is used to secure millions of dollars already for more than a year and half. That verses trusting a chain with possible bugs and making a “smart” contract in a language you might not know well and therefore not build it right. Here you can literally do it with a few clicks. The