@teste
#5 is not possible in an automated fashion (at least not without trust). If the coins can't move until they both agree, any "automated" coin return process will give one party an edge to scam the other. For instance, if it's buyer-seller escrow and the coins are supposed to go to the seller after 30 days, then the seller doesn't have to send the merchandise -- they just stop responding for 30 days and they get the money.
If you want #5, you must include a third-party who can arbitrate. If the coins need to be moved and one party is uncooperative, the third-party can verify the terms of the agreement and help get the coins to where they're supposed to go.
@etotheipi
1- What I would like is a collateral incentive:
(The collateral serves also as incentive to follow the protocol (e.g. that Bob is not lazy or careless and forget to release the payout tx).
2- Question: The bitcoin protocol doesn´t allow to specify a date to automatically return the bitcoins to people that funded the lockbox? (I would like this feature, because a lockbox participant may for example, die.) But I would like to know if is possible too, have an option to (any lockbox participant) extend the term (to return the bitcoins) that "was"specified when creating the lockbox.
Sorry for the bad english.