You could categorize your tasks by using color labels. In Taskulu you have six color labels and one colorless label.
Adding Labels to Tasks
For adding a label color to a task click on the task to open task modal . Then find "Set color" and select the label.
Or you can press the 0,1,2...6
0 is for colorless and numbers from 1 to 6 for colors.
Removing Labels from Tasks
For removing a label color from a task click on the task to open task modal . Open the labels section and select "No Label".
Depending on the accesses that you applied, the visibility of the tags will change, and in the lists and pages you do not have access to, the created tags are also not visible.