Can we have Multiple access keys in the same AWS account

Is it possible to have multiple access keys with different privileges in the same AWS account?

Yes. This can be done using Identity and Access Management (IAM). IAM enables you to create and manage users in AWS. It also manages resources for your users and enables you to grant access to AWS resources for users managed outside of AWS in your corporate directory.
For more information on IAM, refer Access Management - AWS Identity and Access Management (IAM) - AWS

Yes, AWS Identity and Access Management (IAM) enables you to securely control access to AWS services and resources for your users.
IAM enables you to create and manage users in AWS, and it also enables you to grant access to AWS resources for users managed outside of AWS.