EFT Server will always evaluate expressions from left to right, regardless of how many conditional checks there are within that same expression; however, there is one exception, described below.
Certain conditions are able to test multiple values, such as the If User is Member of condition or the If Filename is one of condition. These conditions are evaluated first and independently, with the resulting atomic unit evaluated as part of the complete expression.
For example, the If User is Member of condition allows you to select from a list of Server Groups, therefore, the If User is member of expression is evaluated first, after which the rest of the expression is evaluated from left to right.
Adding a Condition to an Event Rule