CaseComplete doesn't currently have a pre-made table / grid of the type you're looking for. What you can do is build a custom table on your diagram by grouping shapes (such as rectangles) together.
In order to build a table (or grid), drag a base shape - the rectangle, for example - onto your diagram and edit it to your liking as far as size, style, etc. go. This shape will form the basis of your grid. You can then right-click and Copy / Paste as many of these rectangles as you need to build a row and/or a column for your grid.
Once you have the shapes for your row or column aligned, select them all and right-click, then click Group. You can then move, Copy / Paste and resize your row (or column) in the same manner you did with the individual rectangles. If need be, you can also group the final number rows / columns together, and move the grid (essentially a collection of rectangles) and resize as a whole.
