Dynamic Columns for the Business Workplace 
Use
Up to 6 columns in the workflow inbox of the
Business Workplace can be filled on a task-specific basis with contents that are determined dynamically at runtime.The standard functions for filtering, sorting, and grouping are available for these columns.
Please compare with
Selectable Columns for the Business Workplace.Features
If you want to include one of the "dynamic columns" into the workflow inbox display, you must specify an element from the task container for each task, from which the content of the column is established at runtime.

Work items that belong to different tasks are then also displayed with different information. Work items that belong to tasks for which this functionality is not used are displayed with a blank entry.
Activities
The column contents are maintained via Tools ® Business Workflow ® Development ® Definition tools ® Worklist client ® Dynamic columns for worklist.

You can also define the column headings. These headings are displayed if all of the work items displayed in the Business Workplace refer to the same task.