How to make an automatic task run by a user? it is a system task, but we want it

You might have luck putting the Lock Document task in a sub process, set the sub process as assigned to the user you would like to lock under, then set the Lock Document task to run as the process initiator in the sub process.

You might have luck putting the Lock Document task in a sub process, set the sub process as assigned to the user you would like to lock under, then set the Lock Document task to run as the process initiator in the sub process.