Use Session Variable in intent precondition

Can I use a session variable in the intent precondition of a knowledge graph node?

I am setting a session variable on taking user input say var1
I have enabled Qualify Contextual Paths: Qualify paths in the Knowledge Graph using the context tags available in the context.

now when var1 = ‘value1’ I want to qualify the path having ‘value1’ in the knowledge graph for intent qualification. That is qualify those faqs only which are under the node with the name ‘value1’.
How is this possible?
I am trying to achieve context switching based on user input on what context the user wants to set.