Here's a different way to part that feline from its protective fur covering:
Assuming your work tasks and your personal tasks are not commingled in the same project, make a folder for your work projects and a folder for your personal projects. Now when you focus on the work folder (select the folder in the sidebar and use the toolbar Focus button), you will only see actions from the projects therein, and similarly with the personal folder. Make yourself a set of perspectives that selects only one of the folders, making sure that the Restore: Focus box is ticked in the Perspectives window, and you can switch back and forth between those views easily, regardless of what day or time it is.
If you really want to get some Rube Goldberg action, and want it to automatically jump to the proper perspective based on date/time, you can do it in conjunction with iCal. OmniFocus can be instructed to open a perspective if you open a URL of the form omnifocus:///perspective/perspectivename (yes, there are 3 '/' characters, not 2), and iCal as one of its alarm choices can run a script. If you had a perspective named "Work projects", the following Applescript would open it:
Code:
do shell script "open omnifocus:///perspective/Work%20projects"