Note top government contractors. This may be one of two things, one related to the current shutdown/debt ceiling mayhem the other being related to conditions under which some companies seek recruits.
Government contractors may not be able to hire at present because their contracts are suspended until the politicians GTST. However, contractors have another habit recruits might find annoying.
Companys X, Y, and Z are bidding on some managed service contract for DOn, where n is Agriculture, Defense, Energy, Edumacation, Transportation, or whatever. Each has to provide DOn with a resume for every position it intends to fill. Since the companies are each proposing to populate a building with 1000 warm bodies, they each need 1000 resumes - preferably without any overlap with other companies bidding on the same work. Therefore, the gist of this question is 'are you being submitted to the government for the same (or different) roles for each of several contractors?'. In some cases you may not even know this is why your resume is being solicited or how tenuous this opportunity is.
Thus it's possible you might be hired, but only if the contractor wins the bid. If you're out of work, you may find employers are hot to talk to you to fill their resume pool, even though you don't stand a snowball's chance of actually being employed. If you're working somewhere else and you're in a hurry to get out, don't hold your breath.
Having done government work (for the US Air Force in the 1990s) I've noticed two things: first is the pay is miserable, which is OK if the alternative is none at all, the other is that one has outsized opportunities to learn new stuff. These tend to be big organizations with aggressive technology portfolios. Private industry would not trust people with trivial amounts of experience with such responsibilities. Someone hardly in the Air Force for more than two years is designing and maintaining Oracle databases - at age 20 with no college this is pretty significant.
Ideally, you are in one of two situations: first is that you are working somewhere but not in a big rush to move. Once the requisition is sorted out you will get an offer, if you are actually needed. For IT work, you are actually needed (if you know what you're doing).
The second is that you're camped out at home with a recently acquired degree and can mow lawns until something better comes along, and you need a 'break' to get some experience. Believe me, this is an experience.
In the meantime, to answer the question, if you are close to 'closing', what it means to them is that they have to find another resume for the slot. If you're still wandering in the wilderness, they'll presume you're available when the contract comes through. If one or more other contracts has you listed for the same position, you're likely to be more valuable than if there each contractor has a distinct candidate.