If you understand burning and dodging then it will be easier.

Advanced printing techniques using multigrade paper uses different filtration values for different selected areas which is actually a lot easier than you think once you understand the principal, but this may take several attempts and tests to get the optimum grade/exposure for a particular area.
For example a high contrast area printed using a grade 2 filtration may be better 'burnt in' using a Grade 1 filter, conversely, an area that has little contrast may benefit with a filter of a higher value to give it 'some bite' With 'dodging' I generally find that the same filtration used for the main part of the print usually suffices.

I try to avoid this problem from the start by rating a film less than the stated ISO and reducing the development time, this gives me a negative with lower contrast which I can always boos if needed. As a bonus I find that the grain can be reduced as well.