specific user

Process Start Permission to a specific user and Process DeadLine

I need to permit a user to decide, who is the process iniciator to a called process from his process and determinate a deadline for the process iniciator. How i can do this? In process actor definition, dont have a valor input for variables...
Im using Bonita 6.5, later i will migrate all project to 7.0~
Sorry for making two questions in one, but saves time in this way