Limit the options that a filter shows. I want the filter to show only a few options.

Hi :) ! I'm using the calculated field:

"[legajo] = username()" so the dashboard filters automatically the information of the person that is viewing it.

Now, i want the dashboard to have other filters shown.

For example, a filter called "subjects" that is shown in the dashboard.

I am doing maths and physics.

And all the subjects are maths, physics and gym.

I want the filter "subject" to only show the options maths and physics, subjects that i am doing. (NOT all 3, all the options).

In the filters i have ALL the information from the field. I want the filters to only show the info of

"[legajo] = username()" .

Is there a way to do this? Thanks in advanced