The problem here resides in the way to announce to Writer that what follows is the start of a new instance of the list.
a list style identifies paragraphs as members of an abstract list which is distinguished by various attributes such as the kind of numbering (bullet, number, letters, …), character style of the numbering, indentation of levels, etc. Two lists decorated by different list styles represent different semantic significance and are independent from each other. This means their numbering sequences don’t interact and we can achieve “interesting” (and predictable) effects by interleaving both lists.
Usually a document exhibits a single abstract “semantic list” (represented by a single list style) but has several instances of this list, the same as we have several paragraphs Body Text without implying they are the same paragraph. It is highly desirable that these instances all restart at 1.
Unfortunately there is no setting in any style (whether paragraph or list) to “delimit” a list.
The only device to explicitly signal the start of an instance is
What I described above about “semantic” definition of an abstract list does not apply to generic
Bullets & Numbering because this feature is dramatically twisted to offer compatibility with the badly designed feature in Word. You’ll meet much more difficulty in controlling your lists with it because it is supposed to cover all lists, be they instances of the same abstract model or not. Modifying an existing list is a real nightmare. So, although mastering list styles is a bit hard, it gives you more reliability and versatility in the end.