Custom Forms - Ability to omit certain values in a drop down based on condition

[#1]

We need the ability to use the skip logic and incorporate the functionality to omit certain values on a conditional basis.

Example:

Field = Business Objective. This field is a drop down with 4 different values to pick from.
If Option #1 is selected, I want the system to take them to a specified field (Value Levers Field) which has 10 different values but I only want it to display 4 of them as the other 6 do not apply to Option #1 but to do apply to other options.

[#2]

Yeah, this would be incredibly useful. We would love to have certain fields be visible depending upon a previous field selection.