Workflow Conditions

Hi,

  I'm working with workflows in AX 2012 and I'm trying to figure out how to add new variables to the 'where' statement of conditional decisions.  I find there are times when I need to make a decision based on variables that are not available in the default workflow.  I assume this is an option in some object in the AOT that lets you reference or link to other tables.  Any guidance would be appreciated.

Thanks,

David