Bummer. CR 9 has a conditional formula for this item in the format menu.
One approach, although there may be a simpler approach, is to place the same object multiple times on the report in the same location, once of each justification option you want (this is really annoying for report maintenance, by the way). Then under the format menu for the object (right-click on the object and choose Format) look on the common tab and click on the X+2 button to the right of the Suppress checkbox. In the formula editor, enter a formula similar to:
{justification field} <> "LJ"
Save the formula and click ok.
This will cause the field to be suppressed whenever the field value of {justification field} is not "LJ". Write a similar formula in the conditional suppression formula for the other object(s) that have different justifications. For example, if you only want two different justifications, you'd have two fields on the report, one formatted with the above conditional formula and the other with it's opposite:
{justification field} = "LJ"
You can accomplish the same thing with multiple sections and conditionally suppressing sections, but depending on the layout of your report, using multiple sections may require as much or more extra maintenance work down the road.