You can Manage SharePoint List Permissions with PowerShell which gives you more control than using the web interface.
If you ever wanted to implement single-item permissions for SQL table rows, you will notice that SQL Server itself does not provide a native solution for that. In contrast to e.g. the SharePoint list...
If you want to copy SharePoint Group Memberships for several SharePoint Sites from one user to another user, this can be done with PowerShell.
K2 Package and Deployment Tool locks user account when creating package.
This cmdlet enforces security for all resources, including files, folders, and registry keys.
Found this very useful post: K2 SERVER EVENT RUN AS API
Just another reason why you would get an Access Denied message back from K2 Workspace when you accessed View Flow.
If you want to show or hide K2 SmartForms Elements depending of the Process Permissions a user has, this is quite easy. This article describes hwo to control visibilty of SmartForms Elements with K2...
It is pretty simple (and convenient at the same time) to integrate custom code to K2 blackpearl as Endpoints Assemblies.