Add a "description" column in process instance list and task list

Now we encounters a problem. When our customers use BPMS(jBPM), when there are too many process instances started from one definition or too many tasks of one human task node from different instances, it is hard to differentiate these instances and tasks because there is not a column which is used to differentiate them or some filter functions to filter them, so they can not quickly focus on the tasks they really care about.(please see attachments for example) So considers the following solution:

• add a "description" column.
• providing an API that can change this column's content during any phases of the process lifecycle, so we can use them to change the description by adding or removing some extra description by some specific process execution contents to let them easily be distinguished.
• considering as an enhancement, can let the list columns be added or removed by user itself?