I see. I thought that might be the case. The Sibelius program can write 4 16th note triplets to a bar, as well as the two 6 note combinations to a bar. It won't write two 8th note waits with 5 note combinations though. I don't think I can write it quite like the sheets but probably pretty close where it would sound about the same. Perhaps I may stumble on a measure timing feature I hadn't noticed, who knows.
I guess there is no time marker that would allow 6 notes to a beat then? without using triplets or 6note combinations
Though I have not used Sibelius, I have used Finale (its main competition) some and I currently use a free open source program called MuseScore. I can assure you that Sibelius is capable of doing just about anything that you can think of that is "legal". It is one of the two major programs even used in modern music publishing.
By "legal" I mean, in terms of rhythm, that it will allow you to put in any combination of rhythm values (including tuplets) that will fit into the restrictions of your meter signature. It won't let you for example, put a whole note in a measure/bar in 2/4 time since a whole note is twice as long, nor will it allow you to put 4 quarters and 1 eighth note in a measure of 4/4 time.
One problem right now is you are giving terminology that is not normal to music so I'm not clear on some of the things that your are asking. For example, what do you mean by "two 8th note waits"? Do you mean 8th note rests? Also, what do you mean by "time marker"? I have guessed that you are meaning rhythm value or duration value, but I'm not sure. Time marker would actually be closer to the concept of beat than to quarter notes and half notes etc. Are you translating from another language into English or just not sure what to call certain things?
What could be helpful is to scan in and upload some examples and write what you are calling them (such as the "waits" and "time markers") and then we can help with the proper terminology and with your questions.
As far as measure and bar, as Haysz, they mean the same thing. Here in the good ole US of A, they often get used interchangeably, though "measure" is more common for the space between bar lines and "bar" is more common as a shortened form of "bar line".