Would like to see Spacewalk able to provide more granular permissions for users.
Here are some examples:
Read only user per group and/or per system.
Remote command only user per group and/or per system.
Configuration management per group and/or per system.
Package management only user per group and/or per system.
Spacewalk is meant for administrators, so this kind of permission granularity isn't a priority for Red Hat's Spacewalk developers and will likely not be completed by Red Hat in the next 2 years. I am going to close this enhancement request out as DEFERRED. I will allow it to be re-opened in the future should someone want this re-visited.