It is interesting to note that I am not aware that the scriptures specifically enjoin against lying as a whole, but rather enjoins against "bearing false witness against your neighbor", or against "[Deceiving] and [laying] in wait to catch, that ye may destroy". Despite this, most church literature on the subject of lying advocates a less nuanced approach. This may be simpler to understand, but the scriptures give instances where deception is used to advance the Lord's work, and the inclusion of qualifiers strongly suggests that "white" lies may actually have a place, whereby a lie is told in order to thwart the adversary and promote the work of the Lord. Based on the qualifiers used, we might imagine that a "white" (or good) lie, might be any lie which the spirit of the Lord prompts us to tell, which is not designed as a trap for our fellow-man, or which is designed to thwart the designs of the destroyer. My thoughts on this are not fully developed.
Lying as an item of prohibition seems to be closely related to trapping others. The Nephites seem to have been keenly aware of this, leading to the odd note in Alma 43:30 that Moroni "thought it no sin that he should defend [the Nephites] by stratagem". At least, this note always seemed odd to me, since strategem would seem an integral element of defense which would seem extremely permissible. However, if the Nephites linked strategem, or trapping, with lying, in a fundamental way, it would seem clear that Moroni, and/or historians writing about him, would need to develop clear reasoning as to why his course of action was permissible.
It should be noted that abusing trust or authority to deceive others for personal gain, or to hide our sins, would clearly be morally wrong, and is an example of Unrighteous Dominion. It is also worth noting that some exegesis of the Unforgivable Sin describes it as doing evil in the name of the Lord. That is, effectively, laying a trap for others by willfully lying by claiming that you are on the Lord's errand in order to lead people astray. One might say that this is lying taken to the utmost extreme.
Analyzing the worthiness of a lie based on its sacrificial economics, it is noteworthy that lying puts our trust at risk and destroys trust wherever it is known. Therefore, telling a lie involves an item of sacrifice, a penalty, and might be rightly considered a transgression, even if it is in accordance with the Lord's will. The sacrifice can only be worth making if the reward for the sacrifice is greater than what is lost. This cannot always be known in advance.