Dynamic Role Based Data Masking

[#1]

I need to show/hide/mask data based on user role.  Is it possible to setup a role and associate with a policy where column level data will be masked based on the effective_user's role?  So if userA is a member of roleX he can view the sensitive data, but userB is not a member of roleX so he sees the masked data.  Same select statement from two different users returns different results based solely on role.  

[#2]

I see that others have solved this with a combination of Impala UDF + View by grabbing the effective_user() and then looking up roles when a query is executed.  Any other options to solve ths?

[#3]

Any update on this? Did you solve this by any means? I am looking at exact functionality in 2019, but, don't see any option other than sensitive data redaction option (don't think it's user/role based though).