Add or modify a Gantt Chart bar filter

To add a filter to a bar

Display the Gantt Chart, then choose View, Top Layout Options, Bars.
Select the bar.
Double-click the Filter column.
Click New.
Type a name for the filter.
In the top row, click the Parameter column and select All of the Following or Any of the Following.
In the Where row, double-click the Parameter column and select an item to include in the new filter.
In the Is column, double-click the corresponding field and select the filter’s search condition or comparison operator.
In the Value column, double-click the corresponding field and type or select the value you want to display for the specified field.
To add another filter field, click Add, then repeat steps 7 through 9 for each field you want to include in the filter.

You can only modify user-defined filters. You cannot modify the default filters.