Under some circumstances, users might want to add Custom Filter like CurrentYear in Intelligent Cube based reports but only View Filters can be added.
In a Report, Users could add a Custom Filter like current year value as shown in the image below:


In an Intelligent Cube based Report, Custom Filter is unable to be added but View Filter could be added as shown in the image below:

CAUSE:
This is working by design.
ACTION:
Users who wish to change this behaviour should post to the Ideas Exchange:
https://success.Strategy.com/s/topic/0TO44000000FljSGAS/Intelligent%20Cubes%20-%20U081?t=1492095779960&tabset-215d6=4aa55