Omnifocus lets you customize views of tasks in "perspectives" which can be configured to show you only the tasks you "need" to see. This extends to a few features in particular:

1. Filtering criteria can be set on three levels (respected in Board/Table/ect. View):
- Don't Show: the Task does not appear
- Unfocus: the Task appears "greyed out"
- Focus: the Task appears normally
2. Custom icons for each View (the ones used for Custom Labels from Font Awesome would work nicely)
3. Each View will remember whether Board/Table/ect. View was used last, or let you assign one. E.g., the View will remember to always use the Table View.