Hi,
there are 2 ways to do this:
1) Via CSS: each field have a own container with class name like alias of the field, so you can add a CSS code in your template like this

table.listusers .postal_code, table.listusers .city {display:inline-block}

2) You can create a field that contain the 2 fields inline by following these steps:
- Create a field of type HTML delimiter called "Address"
- Put in the description editor a code like this

{user postal_code displayed} {user city displayed}

- Set to not show this field in profile, edit profile, and registration pages, it will be used only in the users list
NOTE: The text like {user FIELD_ALIAS displayed} will be replaced by the corresponding field value of the displayed user, docs about content plugin http://docs.easy-profile.com/index.php/article/content-plugin, docs about HTML delimiter field type at http://docs.easy-profile.com/index.php/article/html-delimiter-field-type