To create a new process is not available at the customer interface yet (at least that's what was told in the webinar about process management). Also process management is available for all users, as soon as you create a valid process it will show up in Ticket Menu the option for new Process Ticket.

To give access to ldap users you just need to add them to the groups your process is going to. I mean for example if you want your process ticket to be created in X queue, your uses needs to have permission to create  ticket into that queue, if your process changes to a queue, then only the users who belong that group owning the queue will be able to see them. Process management is very intuitive, I have done a lot with just following the documentation in the Admin manual for the example Purchase Order Process.