Filters Multiple Entries

[JVin]

I'm trying to setup / create filters (rules) in 1.6.5 Roundcube and was wondering if there is a way to specify multiple entries in the same box for foreign extensions, junk emails, spam words, etc.
In other words, let's say one of my filters is called "Foreign Extensions" and I want to  block different email extensions such as .ru, .cn. .pl, etc...   Do I  need to create a separate rule for each extension or can I list all of them in the same box by separating them with either comma or something else?  Anyone done that?  Please help.  In Gmail I separate with "OR" but not familiar how Roundcube works.  Any help will be appreciated.