Cormyr and the Dalelands

Uhm, druids have to follow nature deities, or those with a nature portfolio/domain.  Lliira doesn't qualify as such, and does not qualify as a deity for druids/rangers.

^ what she said ^

A druid must have a nature deity as a patron in order to receive spells (FRCS, p23). But most people on Faerun follow other deities in addition to their patron (FRCS, p232). One aspect of the setting that is sometimes overlooked in NWN is that plenty of people worship more than one deity on a daily basis (FRCS, p232). As an aside, FRCS even goes out of its way to mention that many people offer appeasements to deities of alignments differing from their own.

My interpretation of that is that a druid could follow/worship other deities, as long as their -patron- deity was a nature deity. Though always if there's a house rule it comes first.

Edit: because grammar hard

Yes, a character can worship more than one deity.  I interpreted the statement made as "I have a druid whose patron is Liira."  If that's not the case, then the character concept is fine (as long as the "patron" is the primary deity venerated/served).

Polygamy? Is that the reason?

Polygamy is spouses. When it's gods, it's called Polytheism.

A few points to consider, before redirecting to the original topic.

Eilistraee does not have any of the nature portfolio, but her clergy can and do often multiclass as rangers.  We have an established ranger of Eilistraee (or did).  I am not sure if the source material would make that option available if there was not some degree of flexibility for rangers.  (Granted, some read the 'hunt' portfolio as a nature-oriented one, and Eilistraee has a strong history and connection with the hunt.)

Kelemvor is another who has clerics who sometimes multiclass as rangers, which is even more deviating from the nature realm.  These rangers' purpose is hunting undead.

 FRCS 3.0 states the following on Rangers: "Rangers and druids have similar preferences for deities, although some rangers with odd interests (such as hunting undead) choose different patrons" (p. 16).  So, while as a general rule they commonly and do have nature patrons, the Forgotten Realms has this line in the source indicating they can still have some variance.  The nature-thing might be a rule for general D&D and the FR has all of these exceptions noted.

I would like to discuss this further, either in private or in another thread, if there is more debate to have.  

Sincerely,
Arya

<.<

I think I need to reiterate: we probably should take the rest of this debate to another topic, or a private debate.

~Arya

I know >.> I was is make joke, yes? You laugh.. *takes out gun* YOU LAUGH

The limitation is for druids, not rangers.  As said in the FRCS:

Thus, yes, rangers are not limited to nature deities.  Only druids are.

Eilistraee may not have any nature domains, but she is somewhat tied to nature.  Hunting and hunters are part of her portfolio.

Semi-related to this whole discussion: Is it possible to multiclass wizard and druid for a somewhat unusual path toward mystic theruge?  Or are those two classes so incompatible that it wouldn't be a viable option?

Pretty sure the discussion is purely academic now. Everyone's clear on your particular PC!

It can be done just fine. I have one myself.

A druid must have a nature deity as a patron in order to receive spells (FRCS, p23). The literal reading of those rules seems to suggest that you can be a ranger or a druid of a non-nature deity, you just lose the spellcasting class feature. You can keep the other class features and continue to gain levels in the class. For a druid, that's a substantial disadvantage, but for a ranger (especially a multiclass ranger) that doesn't have very many levels in the ranger class and therefore wouldn't have very many spells anyway, it's much less of a disadvantage.