[keycloak-user] Share resource by checking if some other user is in a certain group

Hello, After some time of using keycloak which works great for most of my demands, I wanted to know if it's possible to create a permission with a policy that will tell me if some user (not the one which is logged in) is within a certain group. For example: User 1 have a digital wallet. This digital wallet have a resource: name: /wallet/{wallet-id} uri: /{user-1-id}/wallet/{wallet-id} scopes: charge/read/... User 2 have a company which is represented as a group User 2 wants to charge user 1 digital wallet but I want him to only be able to do so when user 1 is inside user 2 company's group How can I check this with a policy? Or somehow share user 1 resource with user 2 by a policy? Thanks!