I have a scenario where in after creating relevant Service based roles for all IAM users as to which services can be accessed , I now have to add additional security at Tag level or individual bucket level.
Eg - If "A" user has access to S3 and EMR and "B " user has access to S3 , Redshift and I have X, Y , Z Buckets in my account .
How do I have A only access to X , Y and B only access to Z bucket . In future If I add 100 more users , I need to create 100 more policies , any alternative way or how to address this.